Practice Test


Q1) In 1665, Robert Hooke first detected cells in Show Answer


Q2) The word 'cell' was coined by Show Answer


Q3) _________ had reported cells like human sperms, bacteria, red blood corpuscles etc, through microscopy. Show Answer


Q4) __________ had discovered and named the nucleus in the cell. Show Answer


Q5) Cytology is the study of Show Answer


Q6) Cell theory was proposed by Show Answer


Q7) _________ had coined the term protoplasm . Show Answer


Q8) ________ applied the name protoplasm to the contents of plant embryonic cells. Show Answer


Q9) Modern version of the cell theory states that Show Answer


Q10) ________ had said that all cells arise from pre-existing cells. Show Answer


Q11) Cells originate Show Answer


Q12) Which cells are used as a stem cell ? Show Answer


Q13) Exceptions to cell theory are Show Answer


Q14) Each cell covered by a plasma membrane made up of Show Answer


Q15) In the word totipotency, totus means Show Answer


Q16) Genetic information is passed from one generation to other through Show Answer


Q17) Capacity of a cell to differentiate into any Show Answer


Q18) Which part of the cell divides first during cell division ? Show Answer


Q19) In multicellular organisms, which type of cell division gives rise to tissues ? Show Answer


Q20) Tissues combine to form Show Answer


Q21) Organs combine to form Show Answer


Q22) A multicellular organisms is larger due to Show Answer


Q23) On the basis of intracellular organization what are the two different categories of living organisms ? Show Answer


Q24) In the word prokaryotic, "pro" means Show Answer


Q25) Cocci are Show Answer


Q26) Vibrios are Show Answer


Q27) Bacilli are Show Answer


Q28) Spirilla are Show Answer


Q29) What is the bacterial shape of Streptococcus pneumoniae ? Show Answer


Q30) What is the function of cyanobacteria ? Show Answer


Q31) __________ help in clinging to a support in bacteria. Show Answer


Q32) What is the function of receptor molecules present on bacterial cell wall ? Show Answer


Q33) Major component of the cell wall in bacterial prokaryotes is a polymer of Show Answer


Q34) In prokaryotic cells outermost layer of cell envelope is called Show Answer


Q35) Who discovered Gram staining method ? Show Answer


Q36) Which stain is used to detect Gram positive bacteria ? Show Answer


Q37) Mesosomes are the instructions of Show Answer


Q38) Prokaryotic cell shows Show Answer


Q39) Which of the following is absent in prokaryotes ? Show Answer


Q40) Cell organelle present in both prokaryotes and eukaryotes is Show Answer


Q41) A prokaryotic cell among the following is Show Answer


Q42) In prokaryotes, the genetic material is a Show Answer


Q43) DNA prokaryotic cell is generally Show Answer


Q44) The prokaryotic cells are characterized by Show Answer


Q45) A prokaryotic cell does not contain Show Answer


Q46) Which two sub-units combine to form 70S ribosomes in prokaryotes ? Show Answer


Q47) In prokaryotes, chromsomes are Show Answer


Q48) In prokaryotic cell, the circular DNA molecule is connected to the plasma membrane through the Show Answer


Q49) Prokaryotic cell does not show Show Answer


Q50) Cell wall of prokaryotic cells contain Show Answer


Q51) In prokaryotes, respiratory enzymes are located on Show Answer


Q52) Aerobic respiration is performed by Show Answer


Q53) In bacteria, plasmid is a/an Show Answer


Q54) Plasmid is used in genetic engineering because Show Answer


Q55) Which of the following is not present in prokaryotes ? Show Answer


Q56) Plant cell differs from animal cell in having Show Answer


Q57) Cell wall is present in Show Answer


Q58) __________ perform photorespiration in plants. Show Answer


Q59) Two adjacent cells are joined by Show Answer


Q60) Middle lamella of cell wall is made up of Show Answer


Q61) Plant cell wall possess Show Answer


Q62) Cell wall of eukaryotic cells does not contain Show Answer


Q63) The fluid mosaic model is a theory to explain the structure of Show Answer


Q64) In fluid mosaic model of plasma membrane, Show Answer


Q65) The thickness of lipid bilayer in plasma membrane is Show Answer


Q66) What are the two types of membrane proteins in fluid mosaic model ? Show Answer


Q67) Fluid mosaic model of plasma membrane proposes that Show Answer


Q68) Cytoplasmic connections between adjacent cells are Show Answer


Q69) Cytoplasmic bridges are Show Answer


Q70) The aqueous portion of the cytoplasm is known as Show Answer


Q71) Streaming movement of cytoplasmic matrix is called Show Answer


Q72) The organelles known as the power house or energy store house of a cell are Show Answer


Q73) Cell organelles involved in aerobic respiration are Show Answer


Q74) Cristae are found in Show Answer


Q75) Infolding in the cavity of mitochondrion is called Show Answer


Q76) Oxysomes are present in the Show Answer


Q77) Endoplasmic reticulumm is made up of Show Answer


Q78) Which ER. is resposible for the process of protein synthesis ? Show Answer


Q79) What is the function of smooth endoplasmic reticulum ? Show Answer


Q80) Which among the following is the function of golgi apparatus ? Show Answer


Q81) Which organelle gives rise to primary lysosomes ? Show Answer


Q82) Photosynthetic pigment units are called Show Answer


Q83) Photosynthetic site in plants are called Show Answer


Q84) The plastids which produce colours other than green are Show Answer


Q85) The word lysosomes has been derived from Show Answer


Q86) Lysosomes have a battery of Show Answer


Q87) Suicidal bags in the cell are Show Answer


Q88) The function of lysosomes is Show Answer


Q89) Which cell organelle is involved in the process of exocytosis ? Show Answer


Q90) The process in which cell digest its own organelle is called Show Answer


Q91) Autolysis is brought about by Show Answer


Q92) Lysosomes help in the removal of Show Answer


Q93) Main function of lysosomes is Show Answer


Q94) Primary lysosomes combine with endocytosis vacuole to form Show Answer


Q95) Residual body contains Show Answer


Q96) Primary lysosomes fuse with unwanted cell organelle to form Show Answer


Q97) Sphaerosomes are helpful in Show Answer


Q98) Peroxisomes contain enzymes for the synthesis of Show Answer


Q99) Glyoxysomes are micro bodies containing enzymes for oxidation of Show Answer


Q100) Ribosomes are the centres for Show Answer


Q101) Ribosomes are composed of Show Answer


Q102) Ribosomes are associated with Show Answer


Q103) In animal cell, _______ help in spindle formation during cell division. Show Answer


Q104) _________ plays a vital role in the formation of flagella. Show Answer


Q105) A mature palnt cell has Show Answer


Q106) Vacuole is bound in a cell by a membrane called as Show Answer


Q107) In paramoecium, homeostasis is maintained by Show Answer


Q108) The only structure present in animal cell is Show Answer


Q109) Non-membranous organelle is Show Answer


Q110) Organelle involved with lipid and lipoprotein synthesis is Show Answer


Q111) which statements is true for animal cell ? Show Answer


Q112) Which cell organelle reduces the number of other cell organelles ? Show Answer


Q113) Animal cell is differentiated from plant cell in having Show Answer


Q114) The organism in which body is made of only one cell is Show Answer


Q115) Division of labour is present in Show Answer


Q116) The main controlling cell organelle is Show Answer


Q117) The prokaryotic cells, Show Answer


Q118) In prokaryotic cell, nuclear material is known as Show Answer


Q119) Eukaryotic cell has DNA associated with Show Answer


Q120) The living part of a cell is known as Show Answer


Q121) Nucleus is clearly visible during Show Answer


Q122) In Paramoecium, nucleus is Show Answer


Q123) Multinucleate cells are found in Show Answer


Q124) Polynucleate cells of the animals are called Show Answer


Q125) Polynucleate cells of the plant are known as Show Answer


Q126) In glandular cells the nucleus occupies ________ position. Show Answer


Q127) In adipose tissue cells, the nucleus occupies ________ position. Show Answer


Q128) Nucleus is ________ in cuboidal cell. Show Answer


Q129) Nucleus is ______ in columnar cells. Show Answer


Q130) Nucleus is _______ in Vorticella. Show Answer


Q131) The size of the nucleus of a cell depends on Show Answer


Q132) The structure of the nuclear membrane facilitates Show Answer


Q133) Outer layer of nuclear membrane is in continuation with Show Answer


Q134) Nuclear envelope is also called Show Answer


Q135) The inner nuclear membrane is associated with the dense material known as Show Answer


Q136) Space between two nuclear membrane is called Show Answer


Q137) The perinuclear space is about Show Answer


Q138) The perinuclear space is usually about Show Answer


Q139) Callan and Tomlin first observed the nuclear pores in the nuclei of Show Answer


Q140) The nuclear pores are enclosed by an electron dense ring or cylinder called Show Answer


Q141) The nuclear pores together with annulus is known as Show Answer


Q142) The annuli of the nuclear pore act as a Show Answer


Q143) The selective permeability of nuclear membrane is due to Show Answer


Q144) _____ and ________ first described the presence of fibrous material on inner surface of inner nuclear membrane of Amoeba proteus. Show Answer


Q145) Harris and James described fibrous lamina on inner surface of inner nuclear membrane of Show Answer


Q146) Fibrous lamina is composed of Show Answer


Q147) Which of the following is NOT CORRECT about nuclear envelope ? Show Answer


Q148) The outer nuclear membrane gives off vesicles which fuse to give rise to Show Answer


Q149) Within nuclear membrane a transparent, semi-solid granular and slightly acidophilic ground substanece is present, known as Show Answer


Q150) Nucleoplasm is also called Show Answer


Q151) Karyolymph is a Show Answer


Q152) Nucleolus is involved in the synthesis of Show Answer


Q153) The large-sized nucleoli occur in Show Answer


Q154) The smaller-sized nucleoli occur in Show Answer


Q155) Nucleoli do not occur in Show Answer


Q156) Liver cells have _________ nucleoli. Show Answer


Q157) A dense homogenous body without any limiting membrane in nucleus is called Show Answer


Q158) The nucleoplasm contains many thread like coiled and much elongated structure known as Show Answer


Q159) Chromatin material consists of DNA associated with Show Answer


Q160) Chromatin shows deep colouration when stained with ______ stain. Show Answer


Q161) Light satined and diffused region of chromatin is known as Show Answer


Q162) The darkly satined condensed region of chromatin is known as Show Answer


Q163) The chromatin is made up of small repeating units known as Show Answer


Q164) Chromosomes were first seen by Show Answer


Q165) During cell division chromatin condenses to form Show Answer


Q166) The term chromosomes was first coined by Show Answer


Q167) Nucleoplasm is continuous with cytoplasm through Show Answer


Q168) Chromosomes have an ability of Show Answer


Q169) What is absent in erythrocytes ? Show Answer


Q170) Well organized nucleus is absent in Show Answer


Q171) The nucleus contains Show Answer


Q172) Number of chromosomes are ____________ for a species. Show Answer


Q173) Study of ____________ helps in the determination of phylogeny and taxonomy. Show Answer


Q174) Robert Hooke recorded his work in his book named Show Answer


Q175) Stem cells have the property of self Show Answer


Q176) The basic unit of life is Show Answer


Q177) What is the function of cell wall ? Show Answer


Q178) Chromatophores are found in Show Answer


Q179) In 70S type ribosomes, 'S' stands for Show Answer


Q180) Mitochondria are absent in Show Answer


Q181) Fluid mosaic model was proposed by Show Answer


Q182) Protoplasm is a Show Answer


Q183) Golgi bodies perform the function of Show Answer


Q184) The term Lysosomes coined by Show Answer


Q185) During fertilization which enzyme dissolves the protective covering of ovum ? Show Answer


Q186) Which type of ribosomes are Found in eukaryotes ? Show Answer


Q187) Usually nucleus remain located in the Show Answer


Q188) _________ and __________ first observed the nuclear pores in the nuclei. Show Answer


Q189) Oxysomes are also called Show Answer


Q190) Celltilar totipotency is by Show Answer


Q191) In chloroplasts, chlorophyll is present in the Show Answer


Q192) The telomeres of eukaryotic chromosomes
consists of short sequence of Show Answer


Q193) The main organelle modification and outing
of newly synthesized proteins to their
destination Show Answer


Q194) Chemiosrrfotic theory synthesis in the
chloroplasts and mitochondria is based on Show Answer


Q195) Centromere Is required for Show Answer


Q196) According to widely accepted “fluid mosaic
model” cell membranes are semi-fluid, where lpids and integral proteins can diffuse
randomly.
In recent years,thismodel has beenmodified
in several respects. In this regard, which of
the following statement is incorrect ? Show Answer


Q197) A student wishes to study the cell structure
under a light microscope having 10X
eyepiece and 45X objective. he should
illuminate the object by which one of the
following colours of light so as to get the
best possible resolution ? Show Answer


Q198) Select the wrong statement from the
following. Show Answer


Q199) Keeping in sithe ‘fluid mosaic model1
tor
the structure of cell membrane, which one
of the following statements is,correct with
respect to the movements oflipids and
proteins one lipid monolayer to the the other
( described as flipflop movement) Show Answer


Q200) The two of ribosome remain united at a
critical level of Show Answer


Q201) Vacuole in a/jsteal eetl Show Answer


Q202) In germinating seeds fatty acids are
degraded degraded exelusively in the Show Answer


Q203) Plasmodesmata are Show Answer


Q204) Cytoskeleton is made up of Show Answer


Q205) Middle lamella is composed mainly of Show Answer


Q206) Which one of the following structure between two adjacent cells is aa transport
pathway? Show Answer


Q207) The main area of various types of activities
of a cell is a Show Answer


Q208) The plasma Membrane consists of mainly Show Answer


Q209) An eiabomte network of filamemous
proteinaceous structures present in the
cytoplasma which helps the maintenance
of cell shape is called Show Answer


Q210) Peptide synthesis inside a cell takes place
in Show Answer


Q211) Which one of the following is not considered
as a part of the endomembrane system? Show Answer


Q212) Ribosomal RNA is actively synthesized in Show Answer


Q213) Which one of the following is wrong
statement ? Show Answer


Q214) What is true about ribosomes? Show Answer


Q215) Select the correct statement from the
following regarding cell membrane. Show Answer


Q216) Which one of the following structures is an
organelle within an organelle? Show Answer


Q217) Which one of the following cellular parts
is correctly described? Show Answer


Q218) The major role of minor elements inside
living organisms is to act as Show Answer


Q219) In which one of the following enzymes,
is copper necessarily associated as an
activator? Show Answer


Q220) Which one of the following statements
regarding enzyme inhibition is correct? Show Answer


Q221) The catalytic efficiency of two different
enzymes can be compared by the Show Answer


Q222) Carbohydrates, the most abundant
biomolecule on earth, are produced by Show Answer


Q223) Nucleotides are building blocks of nucleic
acids. Each nucleotide is a composite
molecule formed by Show Answer


Q224) Which of the following is the simplest
amino acid? Show Answer


Q225) Enzymes, vitamins and hormones
can be classified into a single category of
biological chemicals, because all of these Show Answer


Q226) An organic substance bound to an enzyme
and essential for its activity is called Show Answer


Q227) About 98 percent of the mass of every living
organism is composed of just six elements
including carbon, hydrogen, nitrogen,
oxygen and Show Answer


Q228) Modern detergents contain enzyme
preparations of Show Answer


Q229) A competitive inhibitor of succinic
dehydrogenase is Show Answer


Q230) Cellulose is the major component of cell
wall of Show Answer


Q231) Carbohydrates are commonly found as
starch in plants storage organs. Which of
the following five properties ofstarch (1-5)
make it useful as a storage material?
(1) Easily translocated.
(2) Chemically non-reactive.
(3) Easily digested by animals.
(4) Osmotically inactive.
(5) Synthesized during photosynthesis.
The useful properties are Show Answer


Q232) Three of the following statements about enzymes are correct and one is wrong.
Which one is wrong? Show Answer


Q233) Which one is the most abundant protein in
the animal world? Show Answer


Q234) Which one of the following biomolecules is
correctly characterized? Show Answer


Q235) In the somatic cell cycle Show Answer


Q236) If you are provided with root-tips of onion
in your class and are asked to count the
chromosomes, which of the following
stages can you most conveniently look into
? Show Answer


Q237) Which one of the following precedes
reformation of the nuclear envelope during
M phase of the cell cycle? Show Answer


Q238) At what stage of the cell cycle are histone
proteins synthesized in a eukaryotic cell? Show Answer


Q239) Synapsis occurs between Show Answer


Q240) During mitosis, ER and nucleolus begin to
disappear at Show Answer


Q241) Select the correct option with iMpit; to
mitosis. Show Answer


Q242) At metaphase attached to the spindle
fibres by their Show Answer


Q243) During gamete formation, the enzyme
recombinase participates during Show Answer


Q244) The given figure is the representation of a
certain event at a particular stage of a type
of ceil division. Which is this stage ? Show Answer


Q245) Identify the meiotie slsjp in which the
homologous ehromo-1 senses separate
while the sister Chromatids remain
associated at their centromeres. Show Answer


Q246) Whichch is substitution of mitochondria in
E. coli ? Show Answer


Q247) In eukaryotic cells, the amount of basic
proteins is often Mad to be Show Answer


Q248) Winch one of the following is a correct
statement ? Show Answer


Q249) Animal cell differs from plant cell in
possessing Show Answer


Q250) The prokaryotic cells are characterised by Show Answer


Q251) Prokaryotic ribosomes are Show Answer


Q252) Which is absent in prokaryotes ? Show Answer


Q253) ‘Cell theory’ was given by Show Answer


Q254) Who among the following concluded that
“every cell comes from a pre-existing cell”
? Show Answer


Q255) The basic postulates of the cell theory are
(i) All living organisms consists of one or
more cells.
(ii) The cell is the basic unit of structure
and function of all living organisms.
(iii) All cells arise from pre-existing cells.
These were proposed by Show Answer


Q256) Dutrochet has given the concept about cell
in Show Answer


Q257) Which one of the following cell is connecting
link between prokaryotes and eukaryotes,
therefore, called as mesokaryotes? Show Answer


Q258) Names of Schleiden and Schwann are
associated with Show Answer


Q259) Electron microscope has a high resolution
power. This is due to Show Answer


Q260) Binding of specific protein on regulatory
DNA sequence can be studied by means of Show Answer


Q261) Which is correct about cell theory in view of
current status of our knowledge about cell
structure? Show Answer


Q262) DNA is present in Show Answer


Q263) In mitochondria, cristae act as sites for Show Answer


Q264) Oxysomes are located inside Show Answer


Q265) ER is attached with Show Answer


Q266) Ribosome mainly has Show Answer


Q267) Which of the following organelle is common
in plant and animal cells? Show Answer


Q268) The non-membranous organelles are Show Answer


Q269) Suicide bags are also called Show Answer


Q270) All cells contain Show Answer


Q271) Golgi bodies are absent in Show Answer


Q272) Which of the following gives mechanical
support to the cell? Show Answer


Q273) In ribosomes, letter S signifies Show Answer


Q274) Primary lysosomes in a cell are formed by Show Answer


Q275) The latest model for plasma membrane is Show Answer


Q276) Polyribosomes are aggregates of Show Answer


Q277) Ribosomes were discovered by Show Answer


Q278) All plastids have similar structure because
they can Show Answer


Q279) Which one is Apparato reticolarel Show Answer


Q280) In double helix of DNA, the two DNA
strands are Show Answer


Q281) RNA does not possess Show Answer


Q282) Which is not consistent with double helical
structure of DNA? Show Answer


Q283) A nucleotide is formed of Show Answer


Q284) In RNA, thymine is replaced by Show Answer


Q285) The unit of nucleic acid is Show Answer


Q286) A segment of DNA has 120 adenine and
120 cytosine bases. The total number of
nucleotides present in the segment is Show Answer


Q287) DNA is composed of repeating units of Show Answer


Q288) Adenine is a Show Answer


Q289) Amino acids are produced from Show Answer


Q290) Which is distributed more widely in a cell? Show Answer


Q291) Amino acids are mostly synthesised from Show Answer


Q292) Glycogen is a polymer of Show Answer


Q293) Which is wrong about nucleic acids? Show Answer


Q294) Which of the following nucleotide sequences
contains 4 pyrimidine bases? Show Answer


Q295) Which purine base is found in RNA? Show Answer


Q296) What are the most diverse molecules in the
cell? Show Answer


Q297) In which of the following groups are all
polysaccharides? Show Answer


Q298) Lactose is composed of Show Answer


Q299) Which of the following have carbohydrate
as prosthetic group? Show Answer


Q300) ATP is Show Answer


Q301) In DNA, when AGCT occurs, their
association is as per which of the following
pair? Show Answer


Q302) DNA is mainly found in Show Answer


Q303) Similarity in DNA and RNA is that Show Answer


Q304) In three dimensional view the molecule of
t-RNA is Show Answer


Q305) Length of one loop of B-DNA is Show Answer


Q306) Anticodon occurs in Show Answer


Q307) Extranuclear DNA is found in Show Answer


Q308) In a DNA percentage of thymine is 20% then
what will be percentage of guanine? Show Answer


Q309) The following ratio is generally constant for
a given species Show Answer


Q310) Which form of RNA has a structure
resembling clover leaf ? Show Answer


Q311) Amino acid sequence, in protein synthesis
is decided by the sequence of Show Answer


Q312) Which antibiotic inhibits interaction
between tRNA and wRNA during bacterial
protein synthesis? Show Answer


Q313) One turn of the helix in a B-form DNA is approximately Show Answer


Q314) In DNA helix, cytosine is paired with
guanine by Show Answer


Q315) Association of a mRNA with several
ribosomes is called Show Answer


Q316) Which of the following carbohydrates is
absent in honey? Show Answer


Q317) Which of the following is not an essential
amino acid ? Show Answer


Q318) Which of the following is a polysaccharide? Show Answer


Q319) The most abundant minerals of a living cell
are Show Answer


Q320) Enzymes having slightly different molecular
structure but performing identical activity
are Show Answer


Q321) Which is a typical example of ‘feedback
inhibition’? Show Answer


Q322) Co-factor (prosthetic group) is a part of
holoenzyme. It is Show Answer


Q323) Some of the enzymes, which are associated
in converting fats into carbohydrates, are
present in Show Answer


Q324) Enzymes are not found in Show Answer


Q325) Which amino acids are present in histones
? Show Answer


Q326) Which is non-reducing sugar ? Show Answer


Q327) The stack of vesicles found inside plastids
in Show Answer


Q328) Sucrose, a common table sugar, is composed
of Show Answer


Q329) Which is not true about sphaerosomes ? Show Answer


Q330) Prokaryotic ribosome has sedimentation
coefficient of Show Answer


Q331) Which of the following shows semipermeability? Show Answer


Q332) Surrounding membrane of vacuole is called Show Answer


Q333) The protein present in wheat grain is Show Answer


Q334) Suicidal bag of plant cell is Show Answer


Q335) The biomembrane tonoplast is Show Answer


Q336) The cell drinking is Show Answer


Q337) Cells are connected by plasmodesmata, the
system is Show Answer


Q338) Radiosotopes used to detect newly
synthesized proteins Show Answer


Q339) Enzymes are Show Answer


Q340) Sucrose is an example of Show Answer


Q341) What is the structure of glucose? Show Answer


Q342) A chromosome having centromere at the
middle is called Show Answer


Q343) In 1831, Robert Brown described Show Answer


Q344) Cuticle is present in Show Answer


Q345) Which cell organelle is not bound by any
membrane ? Show Answer


Q346) Which of the following organelle is common
between plant and animal? Show Answer


Q347) Which of the following is correct in plant
cell ? Show Answer


Q348) Sphaerosomes contain Show Answer


Q349) Most of the cell membranes are principally
composed of Show Answer


Q350) Protein denaturatjon takes place by the
activity of Show Answer


Q351) Site of gluconeogenesis is Show Answer


Q352) Most abundant lipid in cell membrane is Show Answer


Q353) Cholesterol is a Show Answer


Q354) Most common monomer of carbohydrate is Show Answer


Q355) In meiotic cells, homologous chromosomes
synapse during Show Answer


Q356) How many generations of mitosis are
required to produce 128 cells from a single
cell of a root tip ? Show Answer


Q357) During diplotene stage in meiosis Show Answer


Q358) Select the correct sequence of stages of
meiotic-I prophase Show Answer


Q359) In cell cycle, different phases are in the
following sequence Show Answer


Q360) Genetic recombination during meiosis takes
place at Show Answer


Q361) Which is not true for anaphase ? Show Answer


Q362) In which phase proteins for spindle fibre
formation are synthesized ? Show Answer


Q363) Cell plate formation starts from Show Answer


Q364) The drug colchicine has inhibitory effect on
cell cycle in which stage ? Show Answer


Q365) b-oxidation of fatty acids occurs in Show Answer


Q366) The sedimentation coefficient of complete
ribosome in bacterial cell is Show Answer


Q367) Perspiration contains an enzyme that kills bacteria. The enzyme is Show Answer


Q368) Pure fractions of cellular components can
be isolated by Show Answer


Q369) The simple polyhydroxy ketone molecule
containing 3-7 carbons is a Show Answer


Q370) The type of cell junction which facilitates
cell to cell communication is Show Answer


Q371) The dry weight of macromolecules like
DNA, RNA and proteins can be determined
using Show Answer


Q372) An example of non-competitive inhibition
is Show Answer


Q373) The type of bond involved in the formation
of sodium chloride is Show Answer


Q374) The sugar in DNA is Show Answer


Q375) Most abundant constituent of a cell that has unique structure is Show Answer


Q376) In pachytene stage of meiosis, the
chromosomes appear Show Answer


Q377) In mitosis, nucleolus and nuclear membrane
disappears at Show Answer


Q378) Formation of bivalent during meiosis occurs
at Show Answer


Q379) The process of cytokinesis refers to the
division of Show Answer


Q380) Early prophase is also called spireme stage.
In this stage Show Answer


Q381) Which of the following is the longest phase
of meiosis? Show Answer


Q382) Tetrad is made of Show Answer


Q383) Given : (1) chromatid, (2) monad, (3) dyad,
(4) daughter chromosomes. During mitosis
the correct sequence of stages passed
through is Show Answer


Q384) Meiosis I is reductional division. Meiosis II
is equational division due to Show Answer


Q385) Segregation of Mendelian factor (Aa) occurs
during Show Answer


Q386) Mitotic anaphase differs from metaphase
in possessing Show Answer


Q387) In meiosis, the daughter cells differ from
parent cell as well as amongst themselves
due to Show Answer


Q388) Number of chromatids at metaphase is Show Answer


Q389) Meiosis II performs Show Answer


Q390) In a somatic cell cycle, DNA synthesis takes
place in Show Answer


Q391) Which statement best explains the
evolutionary advantage of meiosis? Show Answer


Q392) When paternal and maternal chromosomes
change their materials with each other in
cell division this event is called Show Answer


Q393) During cell division in apical meristem, the
nuclear membrane appears in Show Answer


Q394) Microtubule is involved in Show Answer


Q395) Spindle fibre unite with which structure of
chromosomes? Show Answer


Q396) Best material for the study of mitosis in
laboratory is Show Answer


Q397) Which one of the following is an exception
to cell theory? Show Answer


Q398) Electrons used in electron microscope are
of the wavelength Show Answer


Q399) Which one of the following is not a
characteristic of active transport ? Show Answer


Q400) Which of the following is not a true organelle
? Show Answer


Q401) The main lipid component of the plant cell
membrane is Show Answer


Q402) Detoxification of lipid soluble drugs and other harmful compounds, in endoplasmic
reticulum is carried out by Show Answer


Q403) Which one of the following is not a cell
inclusion ? Show Answer


Q404) Zone of exclusion surrounds Show Answer


Q405) Consider the following statements and select
the correct option.
(A) The endomembrane system includes plasma
membrane, ER, Golgi complex, lysosomes
and vacuoles.
(B) ER helps in the transport of substances,
synthesis of proteins, lipoproteins and
glycogen.
(C) Ribosomes are involved in protein synthesis.
(D) Mitochondria help in oxidative phosphorylation and generation of ATR Show Answer


Q406) In which of the following linear polymeric
biomolecule, the two ends are described as
reducing and non-reducing ends ? Show Answer


Q407) At its isoelectric point a protein has Show Answer


Q408) Which of the following statements regarding
coenzymes and prosthetic groups of enzymes
is not true? Show Answer


Q409) If the length of a double helical DNA is
1.7 meters. The number of base pairs present
in the DNA is Show Answer


Q410) If a highly purified sampleof rat liver DMA
is dissolved in pure pH of the resulting
solution will be Show Answer


Q411) DNA contains naeleobases, sugar and
phosphate. Removal of wlffish among these
from a DNA sample will ‘not significantly
length of the DNA ? Show Answer


Q412) RuBisCo is the most abundant enzyme in the
world and preient in ffflf high concentration
in chloroptats. It is required is very high
concentration for photosynthesis because it Show Answer


Q413) With reference to enzymes, which of “the
following is true? Show Answer


Q414) The tightly bound non proteinaceous organic
compound is Show Answer


Q415) Example of a typical homopolysaccharide is Show Answer


Q416) Inulin is a polymer of Show Answer


Q417) Mannitol is Show Answer


Q418) Which one is an imino acid ? Show Answer


Q419) In a polysaccharide, the individual
monosaccharides are linked by a Show Answer


Q420) Select the incorrect statement. Show Answer


Q421) The number of microtubules in a fiagellum
including those sharing three protofilaments
with eae& other is Show Answer


Q422) Which of the following match is correct? Show Answer


Q423) Aleuroplasts in a cell Store Show Answer


Q424) The size of mitochondrion in plant celiis Show Answer


Q425) Digestive enzyme hydrolases are present in Show Answer


Q426) Consider the following statements.
(A) Plant cells have centrioles which are
absent in almost all animal cells.
(B) Ribosomes are the site of protein
synthesis.
(C) The middle lamella is a layer mainly of
calcium carbonate which holds the
different neighbouring cells together.
(D) In animal cell steroidal hormones are
synthesized by smooth endoplasmic
reticulum.
Of the above statements Show Answer


Q427) With reference to enzymes, turnover number
means Show Answer


Q428) Essential: non-essential amino acid is Show Answer


Q429) Find out the wrongly matched pair. Show Answer


Q430) Which of the following is not a conjugated
protein ? Show Answer


Q431) The energy content in Kcal/g of carbohydrate
: protein : triglycerol respectively is
approximately in the ratio of Show Answer


Q432) Formation of both peptide and glycosidic
bonds involve Show Answer


Q433) Which factor is responsible for inhibition
of enzymatic
process during feed back? Show Answer


Q434) Purines possess nitrogen at Show Answer


Q435) Which one is diaminodicarboxylic amino
acid ? Show Answer


Q436) What are those structures that appear as ‘beads-on-string’ in the chromosomes when viewed under
electron microscope? Show Answer


Q437) The two polynucleotide chains in DNA are Show Answer


Q438) Centrosome is not present in Show Answer


Q439) Channel proteins are involved in Show Answer


Q440) Part of chromosome after secondary constriction is called Show Answer


Q441) Tubulin protein occurs in Show Answer


Q442) Quantasomes are found in Show Answer


Q443) In which one of the following would you expect to find glyoxysomes? Show Answer


Q444) Single stranded DNA is found in Show Answer


Q445) Ribosomes that occur exclusively in mitochondria is Show Answer


Q446) Number of protofilament in microtubule is Show Answer


Q447) …A… are granular structures first observed under electron microscope as dense particles by …B… (1953).
Here, A and B refer to Show Answer


Q448) Middle lamella is present Show Answer


Q449) Rough endoplasmic reticulum differs from smooth walled endoplasmic reticulum due to the presence of Show Answer


Q450) A widely accepted, improved model of cell membrane is Show Answer


Q451) Organelle important in spindle formation during nuclear division is Show Answer


Q452) Consider the following statements and choose the correct one Show Answer


Q453) The backbone of RNA consists of which of the following sugar? Show Answer


Q454) Chemiosmotic theory of ATP synthesis in the chloroplasts and mitochondria is based on Show Answer


Q455) Polysome is formed by Show Answer


Q456) In eukaryotic cell, plasmodesma is lined by plasma membrane. It encloses tubular extension of
endoplasmic reticulum called Show Answer


Q457) The factors which set the limit of cell size or volume are
I. nucleo-cytoplasmic or kern-plasma ratio
II. rate of metabolic activity
III. ability of oxygen and other materials to reach every part of the cell
IV. ability of waste products to pass to the outside
V. ratio of surface area to the volume of the cell
Identify the correct set of statements Show Answer


Q458) The difference between rough endoplasmic reticulum and smooth endoplasmic reticulum is that rough
endoplasmic recticulum Show Answer


Q459) Cilia are Show Answer


Q460) The enzyme DNA polymerase was discovered by Show Answer


Q461) Plant cells possess Show Answer


Q462) Which of the following statements are correct?
I. Occurrence of different types of tissues, organs and organ system results in division of labour
II. A new cell always develops by the division of a pre-existing cells
III. Cells are totipotent
IV. Cell is the smallest unit, capable of independent existence and performing the essential functions of life
The correct option is Show Answer


Q463) Which of the following features are correct regarding ribosomes?
I. Non-membrane bound
II. Absent in plastids and mitochondria
III. Present in the cytoplasm and RER
IV. Take part in protein synthesis
The correct option is Show Answer


Q464) In prokaryotic cell,
I. enveloped genetic material is present
II. ribosomes are absent
III. an organised nucleus is absent
The correct option is Show Answer


Q465) In a DNA molecule, distance between two based is Show Answer


Q466) Antiparallel strands of a DNA molecule means that Show Answer


Q467) Arrange the following steps in a correct sequence as per Gram’s staining technique
I. Treatment with 0.5% iodine solution
II. Washing with water
III. Treatment with absolute alcohol/acetone
IV. Staining with weak alkaline solution of crystal violet
The correct sequence is Show Answer


Q468) In eukaryotes, basic structural unit made up of histone and DNA is Show Answer


Q469) Choose the correct statement from the codes given below
I. Separation from extracellular medium allows the cells to maintain its chemical pool, orderliness of
structure and reactions in contrast to disorderly distribution and randomly interacting molecules in the
extra-cellular medium
II. Cells are unable to recognise one another due to the present of specific chemicals on their surface
III. Cells of plant tissues are often connected with one another through cytoplasmic bridges called
plasmodesmata
IV. Different cells of an organism communicate as well as exchange materials with one another Show Answer


Q470) DNA multiplication is called Show Answer


Q471) Ribosomes are found in Show Answer


Q472) In protoplasm, fat store in the form of Show Answer


Q473) Spindles are formed by Show Answer


Q474) Glycocalyx (mucilage sheath) of a bacterial cell may occur in the form of a loose sheath called …A… or it
may be thick and tough called …B…
Choose the correct pair from the given option Show Answer


Q475) Function of rough endoplasmic reticulum is Show Answer


Q476) Comparing small and large cells, which statement is correct? Show Answer


Q477) Unicellular organisms are Show Answer


Q478) Stain used by Feulgen to stain DNA is Show Answer


Q479) Out of A-T, G-C pairing, bases of DNA may exist in alternate valency state owing to arrangements called Show Answer


Q480) Robert Hooke used the term cell in the year Show Answer


Q481) Okazaki fragments are produced during the synthesis of Show Answer


Q482) Cellulose, the most important constituent of plant cell wall is made up of Show Answer


Q483) In flagella membrane, which enzyme catalysis ATP activity? Show Answer


Q484) During the replication of DNA, the synthesis of DNA on lagging strand takes place in segments. These
segments are called Show Answer


Q485) In DNA of certain organisms, guanine constitutes 20% of the bases. What percentage of the bases would be
adenine? Show Answer


Q486) The term ‘protoplasm’ was coined by Show Answer


Q487) Select the incorrect statement Show Answer


Q488) Which of the following is responsible for the origin of lysosome? Show Answer


Q489) In his bacteriophage experiments, Hershey and Chase demonstrated that DNA is genetic material in Show Answer


Q490) The length of DNA molecule greatly exceeds the dimensions of the nucleus in eukaryotic cells. How is this
DNA accommodated? Show Answer


Q491) Diameter of DNA is constant due to Show Answer


Q492) Which of the following sugars is found in nucleic acid? Show Answer


Q493) Categorise the given statements as true and false
I. Kingdom - Monera have eukaryotic organisation
II. E.coli is a eukaryote
III. Organised nucleus is present in eukaryotes
IV. Paramecium is a prokaryote Show Answer


Q494) Which of the following statements are correct about prokaryotic genetic material (DNA)?
I. DNA is naked, that is without histones
II. DNA is usually circular/single chromosome
III. Outside the genomic DNA, small circular DNA is also present in many bacteria
IV. The smallest DNA are called plasmids Show Answer


Q495) Golgi body originates from Show Answer


Q496) Extension of plasma membrane in prokaryotic cell is Show Answer


Q497) A biomembrane consists of lipids, proteins carbohydrates and water. These lipid molecules are Show Answer


Q498) Thread like protoplasmic projections on the free surface of absorptive cells (such as intestinal cells) are
called Show Answer


Q499) …… are an exception to cell theory Show Answer


Q500) Structural lipids of cell membrane are Show Answer


Q501) Quantasomes are present in Show Answer


Q502) The chemical substances found most abundantly on the middle lamella are released into the phragmoplast
by Show Answer


Q503) According to widely accepted ‘fluid mosaic model’ cell membranes are semi-fluid, where lipids and
integral proteins can diffuse randomly. In recent years, this model has been modified in several respects.
In this regard, which of the following statement is incorrect? Show Answer


Q504) Okazaki fragments are joined in a correct sequence by Show Answer


Q505) Which of the following cell organelles stores hydrolytic enzymes? Show Answer


Q506) Cell is the fundamental structural and functional unit of all living organisms. This was evidenced by the
fact that Show Answer


Q507) What is mitoplast? Show Answer


Q508) Assembly of two subunits, 40S and 60S of the ribosome is Show Answer


Q509) Cell membrane of eukaryotes is composed of Show Answer


Q510) Sigma factor is related to Show Answer


Q511) The figures of cork cells as seen by Robert Hooke were published in the book Show Answer


Q512) Robert Hooke thought about the cells that Show Answer


Q513) Ribosomal RNA (rRNA) is synthesised in Show Answer


Q514) Which of the following organelles does not contain RNA? Show Answer


Q515) Read the following statements and identify the correct option given.
I. In prokaryotic cell, the nuclear membrane, chloroplast, mitochondria,
microtubules and different kinds of pili are absent.
II. In eukaryotic cell, the nuclear membrane, chloroplast, mitochondria and pili are
present.
III. In prokaryotic cell, the ribosome is of 70 S type and in mitochondria of
eukaryotic animal cell, the ribosome is 80 S type Show Answer


Q516) Schleiden (1838) proposed that cell is the structural and functional unit of life. His idea was a/an Show Answer


Q517) In DNA, which of the following is absent? Show Answer


Q518) Which of the following enzymes has/have haeme as a prosthetic group?
I. Catalase
II. Carboxypeptidase
III. Succinic dehydrogenase
IV. Peroxidase Show Answer


Q519) In prokaryotes, chromatophores are Show Answer


Q520) hnRNA undergoes two additional processing. Out of which, in one of them an unusual nucleotide (methyl
guanosine triphosphate) is added to the 5’ – end of hnRNA. This is known as Show Answer


Q521) In prokaryotic cells, an organelle like the one is eukaryotic cells is Show Answer


Q522) Amino acid binding site in tRNA is Show Answer


Q523) Protoplasm of a eukaryotic cell is called Show Answer


Q524) In which cell organelles, a lipoprotein covering is absent? Show Answer


Q525) The infoldings in mitochondria are known as Show Answer


Q526) Which one is the correct statement about the bacterial cell envelope? Show Answer


Q527) Arrange the following cells in an ascending order of their size and select the correct option
I. Ostrich eggs
II. Mycoplasma
III. Bacteria
IV. Human RBCs Show Answer


Q528) Eukaryotes includes Show Answer


Q529) Which enzyme joins DNA fragments? Show Answer


Q530) What is C-value paradox? Show Answer


Q531) If a length of DNA has 45,000 base pairs, how many complete turns will the DNA molecule takes? Show Answer


Q532) The distance between two base pairs in DNA is Show Answer


Q533) Analyse the following pairs and identify the correct option given.
I. Chromoplasts – Contain pigments other than chlorophyll
II. Leucoplasts – Devoid of any pigments
III. Amyloplasts – Store proteins
IV. Aleuroplasts – Store oils and fats
V. Elaioplasts – Store carbohydrates Show Answer


Q534) Which of the following is not relevant to the structure of double helical DNA? Show Answer


Q535) RNA has uracil instead of Show Answer


Q536) Which of the following cellular organelles is/are bound by a single membrane?
Peroxisomes, lysosomes, mitochondria Show Answer


Q537) Red colour of tomato is due to Show Answer


Q538) What is the difference between RNA and DNA? Show Answer


Q539) Cell membrane was discovered by Schwann (1838) but it was named by Show Answer


Q540) Which of the following is not present in cell vacuoles? Show Answer


Q541) If a cell has a twice as much DNA as in a normal functional cell it means that the cell Show Answer


Q542) Within the nucleus DNA is organised along with proteins into material called Show Answer


Q543) The molecular action of UV light is mainly reflected through Show Answer


Q544) Three of the following statements regarding cell organelles are correct, while one is wrong. Which one is wrong? Show Answer


Q545) Plasmodesmata connections helps in Show Answer


Q546) Which of the following pair is mismatched? Show Answer


Q547) The rough endoplasmic reticulum (RER) in the cells are because of the presence of Show Answer


Q548) Which one of the following is the correct matching of three items and their grouping category? Show Answer


Q549) The two subunits of ribosome remain united at a critical ion level of Show Answer


Q550) Study of form, structure and composition of cells is called Show Answer


Q551) Acid hydrolase is found in Show Answer


Q552) Which of the following maintains continuity between the water and lipid phases inside and outside the
cells? Show Answer


Q553) The mineral present in cell wall is Show Answer


Q554) Lipid bilayer is present in Show Answer


Q555) Endoplasmic reticulum is in continuation with Show Answer


Q556) Which of the following is the filler substance of the matrix of eukaryotic cell? Show Answer


Q557) Which of the following does not contain DNA? Show Answer


Q558) The fluidity of membranes in a plant in cold weather may be maintained by Show Answer


Q559) In a double helix of DNA molecule of 10 coils, if there are 30 adenine nitrogen bases, what is the number of
guanine nitrogen bases? Show Answer


Q560) The study related to the structure and function of a cell is called Show Answer


Q561) Pits present in the wall of plant cells helps to produce a protoplasmic continum, called…… amongst cells Show Answer


Q562) Main component of ribosome are Show Answer


Q563) Statements
I. The four nucleotide bases are not necessarily present in DNA in exact equal
proportions.
II. The total amount of purines are equal to the total amount of pyrimidines.
III. DNA ligase enzyme act to hydrolyse or breakdown a polynucleotide chain into
its component nucleotides.
IV. Nuclease enzymes are capable of restoring an intact DNA duplex.
Of the above statements Show Answer


Q564) Which is not true about spherosomes? Show Answer


Q565) Elaioplasts store Show Answer


Q566) Which of the following is the function of cytoskeleton? Show Answer


Q567) Vital stains are employed to study Show Answer


Q568) Which one of the following is not a plastid? Show Answer


Q569) Which of these is wrongly matched? Show Answer


Q570) In DNA structure, Nobel Prize was given to Show Answer


Q571) Phagocytosis and pinocytosis are collectively termed as Show Answer


Q572) Cell theory is not applicable for Show Answer


Q573) In multicellular organisms, the 70 S ribosomes are found in the following parts of the cells Show Answer


Q574) Ribosomes are particles about 200Å units in diameter consisting of protein and RNA. The percentage of
protein and RNA respectively is Show Answer


Q575) The term ‘cytoplasm’ and ‘nucleoplasm’ were given by Show Answer


Q576) Which is not true about prokaryotes? Show Answer


Q577) Nuclear membrane is continuous with Show Answer


Q578) Protein synthesis takes place in Show Answer


Q579) Structure of nuclear membrane help in Show Answer


Q580) The ATP synthase of chloroplasts is like that of Show Answer


Q581) Protoplast denotes the ….. of protoplasm present in a cell Show Answer


Q582) An organism exclusively with 70 S type of ribosomes contains one of the following Show Answer


Q583) In the DNA molecule Show Answer


Q584) The Z-DNA helix is left handed and has a structure that repeats every Show Answer


Q585) The inward movement of ions into the cells is ……
and the outward movement is…. Show Answer


Q586) Centrioles arise Show Answer


Q587) If there are 120 adenine molecules in a B-DNA double helical structure showing 20 coils, what is the
number of pyrimidine nucleotides forming three hydrogen bonds in it? Show Answer


Q588) Flocculation or coagulation of protoplasm is the Show Answer


Q589) Nucleolus is Show Answer


Q590) The process by which cells loose their specialisation is called Show Answer


Q591) Which one of the following nitrogenous bases is seen only in RNA? Show Answer


Q592) Golgi complex works for Show Answer


Q593) Which statement is not true about prokaryotes? Show Answer


Q594) Which is not correct according to Chargaff’s rule? Show Answer


Q595) During DNA replication in prokaryotes, DNA is anchored to Show Answer


Q596) Correct sequence of layers of bacterial cell envelope is Show Answer


Q597) What is true about tRNA? Show Answer


Q598) The endoskeleton of cell is made up of Show Answer


Q599) Autonomic genome system is present in Show Answer


Q600) Choose the correct statements
I. Passive cells are larger in size
II. Larger cells have lower surface volume ratio
III. To remain active, larger cells are either cylindrical in shape or possess several extensions of the cell
membrane, like microvilli
IV. Microvilli are found in all those cells, which are active in absorption
V. Microvilli (membrane infoldings) occurs in transfer cells found in plants in the region of absorption or
secretion of nutrients
Option containing all correct statements is Show Answer


Q601) Prokaryotic cells are generally….. and multiply more rapidly than the eukaryotic cells Show Answer


Q602) Animal cell contains non-membrane bound organelles called ……which helps in cell division Show Answer


Q603) In prokaryotes, genetic material is Show Answer


Q604) Which of the character is not applicable to tRNA? Show Answer


Q605) Choose the incorrect match. Show Answer


Q606) Which of the following cell organelles is rich in catabolic enzymes? Show Answer


Q607) There are special proteins that help to open up DNA double helix in front of the replication fork. These
protein are Show Answer


Q608) Select the right option which relates to Schwann regarding the following statement
I. He reported that cells have a thin outer layer which is today known as plasma membrane
II. Cell wall is a unique character of the plant cell
III. Body of plants and animals are composed of cells and product of cells
Choose the correct option from below Show Answer


Q609) Within the cell, ribosomes are found in Show Answer


Q610) Which of the following characteristic is correct about cell of plant cells? Show Answer


Q611) Which one is single membrane cell organelle? Show Answer


Q612) Middle lamella is composed of Show Answer


Q613) When a molecule moves across a membrane independent of other molecules, the process is called Show Answer


Q614) Meselson and Stahl experiment proved Show Answer


Q615) Which one of the following remains absent in prokaryotes? Show Answer


Q616) Thylakoids occur inside Show Answer


Q617) Cell organelle common in Monera and Protista is Show Answer


Q618) Ribozyme was discovered by Show Answer


Q619) Cellular respiration is carried out by Show Answer


Q620) Which of the following enzyme is used in DNA multiplication? Show Answer


Q621) Which of the following is correct for middle lamella of eukaryotic cell? Show Answer


Q622) Polyribosomes are aggregation of Show Answer


Q623) Subunits in prokaryotic ribosomes are Show Answer


Q624) Plant cell may be without Show Answer


Q625) Robert Hooke developed a microscope with which he studied the internal structures of the cell. His work
is famous for the study of Show Answer


Q626) The enzyme which helps to cut one strand of DNA duplex to release tension of coiling of two strands is Show Answer


Q627) Cell wall consists of Show Answer


Q628) Which cell organelle is present in both prokaryotic and eukaryotic cell? Show Answer


Q629) Flagella of prokaryotic and eukaryotic cells differ in Show Answer


Q630) The surface of the endoplasmic reticulum (ER) is covered with Show Answer


Q631) Keeping in view the ‘fluid mosaic model’ for the structure of cell membrane, which one of the following
statement is correct with respect to the movement of lipids and proteins from one lipid monolayer to the
other (described as flip-flop movement)? Show Answer


Q632) In prokaryotic cells, Show Answer


Q633) Which of the following statements regarding cilia is not correct? Show Answer


Q634) Glycocalyx is associated with Show Answer


Q635) Cell theory was formulated by Show Answer


Q636) The main organelle involved in modification and routine of newly synthesised proteins to their destination
is Show Answer


Q637) Plasma membrane helps in Show Answer


Q638) Which of the following is a part of endomembrane system of eukaryotic cell? Show Answer


Q639) I. It is the extension of plasma membrane into the cytoplasm
II. It helps in cell wall formation, DNA replication, respiration, secretion processes, increases the surface
area of plasma membrane and enzymatic contents. It also helps in cytokinesis
III. It I the characteristic of bacterial cells
The above features are attributed to bacteria Show Answer


Q640) Solenoid is a structure of Show Answer


Q641) DNA strand which is formed continuously in 5’ → 3’ direction is called Show Answer


Q642) Which of the following organelle is present in highest number in secretory cells? Show Answer


Q643) Ribose sugar is present in Show Answer


Q644) All the statements are correct for prokaryotic cells, except Show Answer


Q645) Which of the given statements are correct?
I. Escherichia coli is a Gram (−) bacteria
II. Bacillus subtilis is a Gram (+) bacteria
III. Working of the Gram’s stain in Gram (−) bacteria is due to high lipid content of the cell wall, which gets
dissolved in organic solvents like acetone
Choose the correct option Show Answer


Q646) Ribosomes are attached to endoplasmic reticulum through Show Answer


Q647) During replication of DNA, Okazaki fragments are formed in the direction of Show Answer


Q648) In eukaryotic cell, thylakoids, if present, Show Answer


Q649) Difference between rough and smooth endoplasmic reticulum is that Show Answer


Q650) Condensation product of adenine, ribose and phosphoric acid is named as Show Answer


Q651) The enzyme used to join the DNA fragments is Show Answer


Q652) Export firm of the body is Show Answer


Q653) Which of the following pairs is mismatched? Show Answer


Q654) Chlorophyll in chloroplasts is located in Show Answer


Q655) Ultimate unit of DNA is Show Answer


Q656) Which sugar is present in nucleic acid? Show Answer


Q657) DNA is denatured by Show Answer


Q658) In prokaryotic cells, which enzyme erases primer and fill gaps in DNA Show Answer


Q659) The crystals of calcium carbonate deposit in the cell is called Show Answer


Q660) Cell membrane controls Show Answer


Q661) Adenosine monophosphate is a Show Answer


Q662) Smooth endoplasmic reticulum acts as a major site for the synthesis of Show Answer


Q663) The nucleus is separated from surrounding cytoplasm by nuclear membrane, which is Show Answer


Q664) The Okazaki fragments in DNA chain growth Show Answer


Q665) Highest number of enzymes is found in Show Answer


Q666) In eukaryotes, the cell wall constitutes Show Answer


Q667) Structural element of chromatin is Show Answer


Q668) Enzyme catalase is seen in Show Answer


Q669) Vacuoles are separated from cytoplasm by a membrane called Show Answer


Q670) Complete the given NCERT statements (I-III) by choosing appropriate options for the blanks (A-D)
I. Cells that have membrane bound nuclei are called …A…
II. In both …B… and …C… cells, cytoplasm is the main arena of cellular activities
III. Cell that lack a membrane bound nucleus are called …D… Show Answer


Q671) Which one of the following pairs of nitrogenous bases on nucleic acids, is wrongly matched with the
category mentioned against it? Show Answer


Q672) Which one of the following is correctly matched? Show Answer


Q673) A nucleoside is Show Answer


Q674) The membrane potential of cell favours the Show Answer


Q675) The prokaryotic cell does not contain Show Answer


Q676) Histones are rich in Show Answer


Q677) Choose the incorrect option Show Answer


Q678) Purines posses nitrogen at Show Answer


Q679) Number of carbons in ring of deoxyribose sugar is Show Answer


Q680) Single membrane bound organelles are Show Answer


Q681) Which one of the following statements is incorrect about the properties of DNA? Show Answer


Q682) The term mitochondria was given by Show Answer


Q683) Cristae are associated with which of the following? Show Answer


Q684) Fat storing granules are Show Answer


Q685) The Golgi apparatus Show Answer


Q686) Acrosome is formed by Show Answer


Q687) Golgi apparatus is absent in Show Answer


Q688) Organisation of a cell has not been achieved in Show Answer


Q689) Cellular totipotency was first demonstrated by Show Answer


Q690) Out of the given cell organelles, which does not possess DNA? Show Answer


Q691) ‘Plasma gel’ is the name of Show Answer


Q692) Which of the following feature is common to prokaryotes and many eukaryotes? Show Answer


Q693) Which one of the following organisms is not an example of eukaryotic cells? Show Answer


Q694) Find the correct combination, that can form a nucleotide of RNA. Show Answer


Q695) DNA consists of two complementary nucleotide chains. If the sequence of nucleotides in one of the chains
is AGCTTCGA then the complementary sequence of the other chain will be Show Answer


Q696) In a hair pin model of RNA, which nitrogen base is present at the short end? Show Answer


Q697) The thickness of unit membrane is Show Answer


Q698) The plasma membrane consists mainly of Show Answer


Q699) Phosphorus is present in Show Answer


Q700) Which chapter of the book Micrographia, written by Robert Hooke gave birth to cell biology? Show Answer


Q701) Material of the nucleus is stained by Show Answer


Q702) When DNA replication starts Show Answer


Q703) Cell adhesion and cell recognition occur due to biochemicals of cell membrane named Show Answer


Q704) Width of the DNA molecule is Show Answer


Q705) Which one of the following is not a constituent of cell membrane? Show Answer


Q706) Vacuole in a plant cell Show Answer


Q707) Which one of the following also acts as a catalyst in bacterial cells? Show Answer


Q708) The number of hydrogen bonds between adenine and thymine in a DNA molecule is Show Answer


Q709) Chemical constituent of cystolith in plants is Show Answer


Q710) Enzyme found functional in lysosome is Show Answer


Q711) Primary wall of eukaryotic cell is …A… layered but secondary wall is …B… layered
Here, A and B refer to Show Answer


Q712) In vitro synthesis of RNA and DNA was carried out first by Show Answer


Q713) In animal cell, reserve food is usually Show Answer


Q714) The type of ribosomes found in prokaryotes is Show Answer


Q715) In a DNA molecule, the adenine is 15%. What will be the percentage of guanine in this DNA? Show Answer


Q716) Which of the following is not a characteristic of prokaryotic cells? Show Answer


Q717) Semi conservative replication of DNA was first demonstrated in Show Answer


Q718) Consider the following statements and choose the correct options
I. The endomembrane system, include plasma membrane, ER Golgi complex, lysosomes and vacuoles.
II. ER helps in the transport of substamces, synthesis of proteins, lipoproteins and
glycogen.
III. Ribosomes are involved in protein synthesis.
IV. Mitochondria help in oxidative phosphorylation and generation of ATP. Show Answer


Q719) Lysosomes are reservoirs (store house) of Show Answer


Q720) The nucleolus is the site of formation of Show Answer


Q721) Which of the following four cell structures is correctly matched with the accompanying description? Show Answer


Q722) In eukaryotic cells, genetic material or DNA is organised into Show Answer


Q723) In a DNA, percentage of thymine is 20%. What is the percentage of guanine? Show Answer


Q724) Which of the following constitutes about 10-20 of total cellular RNA? Show Answer


Q725) Kappa particles are Show Answer


Q726) In prokaryotes, the process of replication is catalysed by the following enzymes. Identify which of the
enzymes is best coordinate with role Show Answer


Q727) A nucleosome is a portion of the chromonema containing Show Answer


Q728) Plant and animal cells, both have Show Answer


Q729) DNA sequence that code for protein are known as Show Answer


Q730) In eubacteria, a celluler component that resembles eukaryotic cells is Show Answer


Q731) Pits are formed on the cell wall is due to lack of Show Answer


Q732) The four basic shapes of bacteria are Show Answer


Q733) Which of the following elements is very essential for uptake and utilisation of Ca2+ and membrane
function? Show Answer


Q734) The lipid molecules present in plasma membrane have polar heads and non-polar tails (as shown in
figure). Which option represents the correct arrangement of lipids in lipid bilayer? Show Answer


Q735) Which is the initial step in mRNA maturation process? Show Answer


Q736) Cell organelle responsible for autolysis is Show Answer


Q737) Identify the palindromic sequence in the following Show Answer


Q738) The largest subunit of prokaryotic ribosomes is Show Answer


Q739) In RNA, which is absent? Show Answer


Q740) Most of the bacterial cell envelope consists of Show Answer


Q741) DNA acts as a template for synthesis of Show Answer


Q742) Which one of the following has its own DNA? Show Answer


Q743) What is a genophore? Show Answer


Q744) Select the double membrane bound cell organelles Show Answer


Q745) Fluid mosaic model was given by Show Answer


Q746) The main arena of various types of activities of a cell is Show Answer


Q747) In plants, vacuole contains Show Answer


Q748) The process of removal of introns and joining of exons in called Show Answer


Q749) 'Omnis xellula-e-cellula' (all cells arises from pre-existing cells). This concept was given by Show Answer


Q750) Difference between prokaryote and eukaryote is in Show Answer


Q751) Unicellular microscopic organism were first studied by Show Answer


Q752) Which of the following is characteristic of phospholipids of plasma membrane? Show Answer


Q753) Cell membrane is made up of Show Answer


Q754) The double helix model of Watson and Crick is known as Show Answer


Q755) Which of the following statement is incorrect about plasmids? Show Answer


Q756) Golgi body arises from Show Answer


Q757) Telomerase is an enzyme, which is a Show Answer


Q758) In Neisseria gonnorrhoeae , fimbriae takes part in …A…, while in Escherichia coli it helps in …B…
Choose appropriate options for A and B to complete the given statement Show Answer


Q759) Which is the common point of similarity between DNA and RNA? Show Answer


Q760) In prokaryotic cell, flagella, if present are
I. single-stranded
II. double-stranded
III. without differentiation of axoneme and sheath
IV. with differentiation of axoneme and sheath
Choose the correct option Show Answer


Q761) Meselson and Stahl experiment on semi-conservative replication demonstrates Show Answer


Q762) During endocytosis, the cell Show Answer


Q763) DNA repairing is done by Show Answer


Q764) Which of the following statements are correct about prokaryotic cells?
I. DNA lies freely in the cytoplasm, not associated with any organelle
II. The amount of DNA do not change as there are no haploid and diploid stages
III. Transcription and translation occurs in the cytoplasm
IV. Protein synthesis occurs only in the cytoplasm
Correct option regarding the above statement is Show Answer


Q765) The main function of lysosome is Show Answer


Q766) Which of the following cell(s) is/are exceptions to the cell theory? Show Answer


Q767) Naked DNA without histones is found in Show Answer


Q768) Which is properly paired? Show Answer


Q769) Which of the following statement is correct about the cell wall of prokaryotic cell?
I. Cell wall, if present, possesses muramic acid
II. Cell wall, if presents, possesses acitic acid
III. Cell wall is always absent
The correct options is Show Answer


Q770) Mechanical support, enzyme circulation, protein synthesis and detoxification of drugs are the functions of Show Answer


Q771) An organelle with an internal cross section showing characteristic 9 +2 morphology is the Show Answer


Q772) The RNA primer is used in Show Answer


Q773) Genes present in the cytoplasm of eukaryotic cells are found in Show Answer


Q774) Which of the following pairs lack the unit membrane? Show Answer


Q775) Which of the following statements are correct?
I. Mycoplasmas are the smallest cells
II. Nerve cells are some of the longest cells
III. Ribosomes are non-membrane bound organelles found only in eukaryotic cells
IV. The cytoplasm is the main arena of cellular activities only in plant cells Show Answer


Q776) Schwann proposed a cell theory according to which Show Answer


Q777) The length of DNA having 23 base pairs is Show Answer


Q778) Which of the following subunits of ribosome is composed of 23 S rRNA and a 5 S mRNA + 32 different
proteins? Show Answer


Q779) Which of the following statements are correct?
I. A multicellular organism is composed of mainly three types of cells
II. Undifferentiated cells are stem cells and are unspecialised cells, which usually possesses the power of
division
III. Differentiated cells are post-mitotic cells and are specialised to perform specific functions
IV. Dedifferentiated cells are differentiated cells which revert to undifferentiated state to take over the
function of division Show Answer


Q780) Ribosomes may also be called Show Answer


Q781) The scientist who was awarded Nobel-Prize in 1959 for in vitro synthesis of polyribonucleotide? Show Answer


Q782) Which of the following statements regarding mitochondrial membrane is not correct? Show Answer


Q783) In a prokaryotic cell, the ratio of A + T/G + C is Show Answer


Q784) Mitochondria are semi-autonomous as they possess Show Answer


Q785) Many cells function properly and divide mitotically even though they do not have Show Answer


Q786) In a DNA segment having six coils, there are 22 nitrogen base pair linked by two hydrogen bonds. How
many cytosine bases are found in that segment? Show Answer


Q787) The chromosome in which centromere lies slightly away from the middle of the chromosome resulting in
one shorter arm and one longer arm, is called Show Answer


Q788) A cell organelle that is exceptionally rich in hydrolytic enzymes is Show Answer


Q789) Term basal body is associated with the development of Show Answer


Q790) Sequence of DNA (non- coding) is known as Show Answer


Q791) Tonoplast is a membrane, which surrounds Show Answer


Q792) Lipid molecules in plasma membrane are arranged in which manner? Show Answer


Q793) Which of the following statement was not explained in the cell theory given jointly by Schleiden and
Schwann? Show Answer


Q794) For the study of structure of nucleus, the best cell is Show Answer


Q795) Cell organelle without a membrane is Show Answer


Q796) Nobody can have life if its constituent parts are not formed of cells. It was observed by Show Answer


Q797) If the cell wall of a cell is removed, the remaining is called Show Answer


Q798) The statement omnis cellula e cellula of Rudolf Virchow has been taken from his book Show Answer


Q799) The transport of metabolities across the biomembrane occurs through Show Answer


Q800) The number of base pairs per helical turn in Z-DNA is Show Answer


Q801) Important site for formation of glycoproteins and glycolipids is Show Answer


Q802) Which of the following represents prokaryotic cells? Show Answer


Q803) Movement of cytoplasm around the vacuole in the cell is called as Show Answer


Q804) Which of the following statement is not correct for prokaryotic cell? Show Answer


Q805) DNA can be formed by Show Answer


Q806) Select the correct fundamental features of cell theory
I. All cells are basically alike in their chemistry and physiology
II. All living organisms are composed of cells and their products
III. Each cell is made of a small mass of protoplasm containing a nucleus inside and a plasma membrane
with or without a cell wall outside
IV. Activities of an organism are the sum total of activities and interaction of its constituent cells
Correct option regarding the statement is Show Answer


Q807) The plasmid DNA confers certain unique characters to bacteria in which they are found. This include
I. resistance to antibiotics
II. no resistance to antibiotics
III. monitor bacterial transformation with foreign DNA
The correct option is Show Answer


Q808) The cell as a basic unit of structure of living things was discovered by Show Answer


Q809) What is the common between chloroplasts, chromoplasts and leucoplasts? Show Answer


Q810) Wall of eukaryotic cell (fungus) is made up of a polymer of Show Answer


Q811) Suicidal bags are Show Answer


Q812) An analysis of a DNA (double strandard) sample yielded 18% cytosine. What would be the percentage of
other bases in this sample? Show Answer


Q813) Which of the following is not a function of vacuole in plant cell? Show Answer


Q814) Inner membrane of mitochondria forms Show Answer


Q815) Plasma membrane is made up of Show Answer


Q816) Many bacteria have small circular DNA outside the genomic DNA. These smaller DNA are called Show Answer


Q817) The diameter of Z-DNA is Show Answer


Q818) Glyoxylate cycle occurs in Show Answer


Q819) A conspicuous rounded body present in nucleoplasm and attached to a particular chromosome at a
definite place is Show Answer


Q820) During replication of a bacterial chromosome, DNA synthesis starts from a replication origin site and Show Answer


Q821) Nucleotide consists of Show Answer


Q822) The ‘Power house’ of cell is Show Answer


Q823) Bacterial flagellum consists of all of the following components except Show Answer


Q824) Middle lamella is mainly composed of Show Answer


Q825) RNA is not found in Show Answer


Q826) Two animal cells are interconnected by Show Answer


Q827) One of the nucleotides of DNA is Show Answer


Q828) Golgi apparatus
I. transports and modifies material.
II. Secrete mucin in respiratory tract.
III. Secretes slime in insectivorous plants
What is correct? Show Answer


Q829) If an isolated strain of DNA is kept at 80-90°C, then Show Answer


Q830) Which one of the following structures between two adjacent cells is an effective transport pathway? Show Answer


Q831) Coupling factor ‘F’ is found in Show Answer


Q832) Which of the following enzymes helps in crossing plasma membrane? Show Answer


Q833) Which one is referred to as soluble RNA? Show Answer


Q834) Which of the following is not true for a eukaryotic cell? Show Answer


Q835) Secondary cell wall grows by Show Answer


Q836) Fat is stored in the plant cell in Show Answer


Q837) If a DNA sequence is same as that of a mRNA copy that is translated into protein, it is called Show Answer


Q838) Read the following statements and select correct options for prokaryotic cells
I. They are generally smaller than eukaryotic cells
II. They multiply more rapidly than the eukaryotic cells
III. They are presented by bacteria, BGA mycoplasma and PPLO (Pleura Pneumonia Like Organism) Show Answer


Q839) Which of the following are properties of reserved cells? Show Answer


Q840) The thylakoid in chloroplast are arranged as Show Answer


Q841) Consider the following statements and choose the correct options
I. The endomembrane system includes plasma membrane, ER, Golgi complex, lysosomes and vacuoles
II. ER helps in the transport of substances, synthesis of proteins, lipoproteins and glycogen
III. Ribosomes are involved in protein synthesis
IV. Mitochondria helps in oxidative phosphorylation and generation of ATP Show Answer


Q842) Membrane that covers the vacuole in a plant cell is called Show Answer


Q843) Read the given statements and select the correct option
I. In Golgi complex, the cisternae have cis face and trans face
II. The cis face and trans face of Golgi complex are called forming face and maturing face respectively Show Answer


Q844) How many binding sites does ribosome have for tRNA molecules? Show Answer


Q845) Which of the following is structural subunit of DNA? Show Answer


Q846) Most prokaryotic cells, mainly the bacterial cells, have Show Answer


Q847) Which one of the following organelles is not surrounded by any membrane? Show Answer


Q848) Read the statements given below with regard to the functions performed by Golgi apparatus?
I. Transport and chemically modify the materials contained within it
II. Secrete mucin in the respiratory tract.
III. Secrete slime in the insectivorous plants.
Which of the following is the correct answer? Show Answer


Q849) Which of the following differentiate plant cells from animal cells? Show Answer


Q850) The types of ribosome found in prokaryote is Show Answer


Q851) The maximum amount of calcium pectate is present in Show Answer


Q852) Subunits of 80 S ribosome are Show Answer


Q853) ‘It has not escaped our notice that the specific pairing we have postulated immediately suggests a possible
copying mechanism for the genetic material’. This is written by Show Answer


Q854) Clover leaf secondary structure of tRNA has anticodon arm which Show Answer


Q855) Which of the following statements are correct for eukaryotic cells?
I. Two envelope organisation
II. The flagella if present, are 11 stranded with differentiation of axonema and sheath
III. Organised nucleus
IV. Cell wall without muramic acid
Choose the correct option Show Answer


Q856) A nucleoid represents the genetic material of prokaryotes. It is known as Show Answer


Q857) Nucleic acid occurs in Show Answer


Q858) Assembly of two subunits 40 S and 60 S of the ribosome is Show Answer


Q859) DNA replication includes Show Answer


Q860) Mesosomes are the infoldings of cells membrane, which
I. helps in cell wall formation, DNA replication and respiration
II. increases the surface area of plasma membrane
III. are present in both prokaryotic and eukaryotic cells
Choose the correct option Show Answer


Q861) The cell organelle associated with intracellular digestion of macromolecules is Show Answer


Q862) According to cell doctrine, which of the following statements are incorrect?
I. The bodies of all living beings are made up of cells and their products
II. Cells are the basic units of structure in the body of living organisms
III. Cells are the basic units of function in living organisms that is, the activities of an organisms are the
sum total of the activities of its cells
IV. Genetic information is stored and expressed inside the cells
Choose the correct option Show Answer


Q863) Long flattened, usually unbranched units arranged in parallel stacks in endoplasmic reticulum are called Show Answer


Q864) Ribosomes are considered as the most primitive cell organelles.
Ribosomes occur in all eukaryotic organisms. Show Answer


Q865) Smaller cells are usually metabolically active cells
Smaller cell have higher nucleocytoplasmic ratio and higher surface volume ratio Show Answer


Q866) Prokaryotes have an one envelope system
There is not even a single membrane that surrounds the prokaryotic cell Show Answer


Q867) The number of mitochondria in a cell do not correspond to the function of the cell.
Mitochondria are common to both plant and animal cells. Show Answer


Q868) A cell membrane shows fluid behaviour.
A membrane is a mosaic or composite of diverse lipids and proteins Show Answer


Q869) A cell is a closed compartment
Plasma membrane of a cell is selectively permeable Show Answer


Q870) Cell is an open system
Cell receives a number of materials including energy containing nutrients from outside Show Answer


Q871) Eukaryotic cells have the ability to adopt a variety of shapes and carry out directed
movements.
There are three principle types of protein filaments-actin filament, microtubules and
intermediate filaments, which constitute the cytoskeleton. Show Answer


Q872) Every cell behaves as a compartment
Cells are partially covered over by a membrane Show Answer


Q873) Mitochondria and chloroplast are semi-autonomous organelles.
They are formed by division of pre-existing organelles as well as contain DNA but lack
protein synthesising machinery. Show Answer