Practice Test

Q1) "Every cell arises from pre-existing cells". This is the famous generalisation of Show Answer

Q2) A series of changes or sequential events which occur regularly in a dividing cell is called Show Answer

Q3) The cell become viscous and refractive for the first time in Show Answer

Q4) During which phase are proteins for spindle fibers synthesized ? Show Answer

Q5) Cell division of bacteria is Show Answer

Q6) DNA replication takes place in Show Answer

Q7) The stage between two successive mitotic divisions is called as Show Answer

Q8) Doubling of genetic material takes place is Show Answer

Q9) Chromosomal replication occurs during Show Answer

Q10) The cell may withdraw from cell cycle after mitosis and it will enter into Show Answer

Q11) Cell stops dividing, once it goes to Show Answer

Q12) Interphase is considered as a Show Answer

Q13) M phase is also called as Show Answer

Q14) Abnormal, unlimited and uncontrolled cell division results in Show Answer

Q15) ________ is the second phase in cell cycle. Show Answer

Q16) The cells do not divide further in Show Answer

Q17) In a somatic cell which is ready to divide, the DNA Show Answer

Q18) Synthesis of macromolecules for the formation of cell organelles occurs in Show Answer

Q19) In cell cycle S phase follows Show Answer

Q20) A cell cycle consists of Show Answer

Q21) In a somatic cell cycle Show Answer

Q22) In cells, centrioles occur Show Answer

Q23) During cell cycle RNA and proteins are synthesized in Show Answer

Q24) In which type of cell division does the nuclear membrane remain throughout the division ? Show Answer

Q25) Out of the following, which is called quiescent stage ? Show Answer

Q26) Amitosis is seen in Show Answer

Q27) Important character of amitosis is Show Answer

Q28) Mitosis occurs in Show Answer

Q29) Mitosis is also called as Show Answer

Q30) Equational division is Show Answer

Q31) The shortest phase in the cell cycle is Show Answer

Q32) Old and worn out tissues are replaced due to Show Answer

Q33) The diploid somatic cell divides by Show Answer

Q34) Karyokinesis is Show Answer

Q35) In which type of cell division two identical daughter cells are formed ? Show Answer

Q36) Chromosomes are equally distributed among daughter cells during Show Answer

Q37) Which division is called somatic cell division ? Show Answer

Q38) Which statement is true about mitosis ? Show Answer

Q39) Nuclear membrane disappears during Show Answer

Q40) During prophase Show Answer

Q41) Nuclear membrane and nucleolus disappear at Show Answer

Q42) Which part of the cell disappears during mitosis ? Show Answer

Q43) At the end of which stage, do cells under microscope and do not show Golgi bodies, nucleous and nuclear membrane ? Show Answer

Q44) Chromosomes show various shapes during Show Answer

Q45) Which is the longest phase in mitosis ? Show Answer

Q46) What happens in the prophase of mitosis ? Show Answer

Q47) In animal cells, the centriole starts moving in opposite direction, till they occupy polar positions in _______ phase of cell division. Show Answer

Q48) In plant cells, the spindle apparatus is Show Answer

Q49) ________ is characterised by the formation of kinetic spindle. Show Answer

Q50) Chromosomes are arranged on equational plate during Show Answer

Q51) Spindle fibers are attached to chromosomes in the region of Show Answer

Q52) The spindle fibers arises from Show Answer

Q53) Longest stage in M -phase of cell cycle is Show Answer

Q54) Mitosis is observed in Show Answer

Q55) Spindle formation starts in Show Answer

Q56) Microtubules are involved in Show Answer

Q57) In which stage are chromosomes arranged at the equator ? Show Answer

Q58) The stage of mitosis when the chromosomes move towards the pole is Show Answer

Q59) The shortest phase in mitosis is Show Answer

Q60) Two sister chromatids are attached with Show Answer

Q61) Separation of chromosomes starts at Show Answer

Q62) Which is NOT TRUE for anaphase of mitosis ? Show Answer

Q63) Nuclear membrane reappers in Show Answer

Q64) Reappearance of nuclear membrane, disappearance of spindle fibers, formation of chromatin network are the characters of Show Answer

Q65) In which phase of mitosis, do disappearance of spindle fibres and reappearance of nucleolus occur ? Show Answer

Q66) In mitosis, the nucleoli reappears during Show Answer

Q67) How many equational divisions are necessary in a cell of onion root tip to form 128 cells ? Show Answer

Q68) The main significance of mitosis is that Show Answer

Q69) What is true about mitosis ? Show Answer

Q70) Spindle fibers are composed of Show Answer

Q71) Division of cytoplasm is called Show Answer

Q72) Karyokinesis is the division of Show Answer

Q73) In animal cell, cytokinesis takes place by Show Answer

Q74) The region of chromosome to which spindle fibres are attached is called Show Answer

Q75) Organelle important in spindle formation during nuclear division is Show Answer

Q76) Growth of organisms takes place due to Show Answer

Q77) Replication of centriole takes place in Show Answer

Q78) The centromere of chromosomes gives rise to a fibre from either side of its surface called as Show Answer

Q79) The most suitable plant material to study mitosis is Show Answer

Q80) Centromere is a part of Show Answer

Q81) When a unicellular zygote forms multicellular organism, _________ division takes place. Show Answer

Q82) Mitosis of plant and animal differs in Show Answer

Q83) The stage at which cleavage or cytokinesis begins in animal cell is Show Answer

Q84) Which of the following is related with cell division ? Show Answer

Q85) Post-mitotic gap phase is also known as Show Answer

Q86) Meiosis is also known as Show Answer

Q87) Meiosis is associated with Show Answer

Q88) Meiosis has evolutionary significance because it results in Show Answer

Q89) In meiosis haploid condition is maintained by which stage ? Show Answer

Q90) The spindle formation is completed and occupied nuclear region during ______ phase. Show Answer

Q91) In meiosis I, the centromere Show Answer

Q92) The period between meosis I and meosis II is called Show Answer

Q93) When paternal and maternal chromosomes mutually exchange their material in cell division, the event is called Show Answer

Q94) Which event is not associated with prophase I ? Show Answer

Q95) Which one of the following structures will not be common to meiotic cells of higher plants ? Show Answer

Q96) Cell division in sexual reproduction is Show Answer

Q97) In meiosis actual reduction of chromosome takes place in Show Answer

Q98) The longest phase in meiotic division is Show Answer

Q99) Anaphase I differs from anaphase II in Show Answer

Q100) Meiosis term was coined by Show Answer

Q101) The chromosomes are thin and long thread - like during Show Answer

Q102) Process of synapsis is seen is Show Answer

Q103) Pairing of homologus chromosomes is called Show Answer

Q104) Bivalents are formed during Show Answer

Q105) During which phase do chromosomes start length-wise contraction ? Show Answer

Q106) Structure formed in Zygotene stage of meiosis, which helps in crossing over is called Show Answer

Q107) During which sub stages of prophase I of meiosis are bivalents and DNA replication respectively found ? Show Answer

Q108) During which stage of meiosis is synapsis formed ? Show Answer

Q109) During ________ phase, two homologous chromosomes start moving towards opposite poles. Show Answer

Q110) Disjunction is Show Answer

Q111) Seperation of homologus chromosomes at the end of anaphase I is called Show Answer

Q112) During telophase I, Show Answer

Q113) A short resting period between meiosis I and meiosis II is called Show Answer

Q114) Interkinesis is followed by Show Answer

Q115) The complex formed by a pair of synapsed homologous chromonosome is called Show Answer

Q116) Terminalization of chiasmata takes place during Show Answer

Q117) Chiasma formation begins at Show Answer

Q118) Meiotic crossing over involves Show Answer

Q119) Chiastama represents the site of Show Answer

Q120) Crossing over is Show Answer

Q121) When paternal and maternal chromsomes change their materials with each other in cell division, this event is called Show Answer

Q122) Crossing over may results in Show Answer

Q123) Recombination between homologus chromosomes is completed by the end of Show Answer

Q124) During _________ phase chromosomes shorten due to coiling. Show Answer

Q125) Chromosome number is reduced to half during Show Answer

Q126) Exchange of characters between maternal and paternal chromosomes occur during Show Answer

Q127) Zygotic meiosis is found in Show Answer

Q128) Meiosis I separates Show Answer

Q129) The division of centromere in meiosis takes place at Show Answer

Q130) The interphase between meiosis I and meiosis II, when present is called Show Answer

Q131) Meiosis II is similar to Show Answer

Q132) Meiosis of a diploid cell produces Show Answer

Q133) Meiosis is a process in which the chromosome duplicate _________ and cell divides _______. Show Answer

Q134) Meiosis is responsible for Show Answer

Q135) Terminaliztion of chiasmata occurs in Show Answer

Q136) During sexual reproduction, which type of cell division maintains the number of chromosomes ? Show Answer

Q137) Dyads are characteristic of Show Answer

Q138) Which type of cell division takes place in gonads ? Show Answer

Q139) Among different stages of prophase I, which one is the longest ? Show Answer

Q140) Celllular structure which always disappears during mitosis and meiosis is Show Answer

Q141) Gametes contain Show Answer

Q142) The pairing of homologus chromosomes in meiosis is known as Show Answer

Q143) Synaptonemal complex is formed during Show Answer

Q144) How many meiotic divisions are required to produce 200 pollen grains ? Show Answer

Q145) The points of crossing over are known as Show Answer

Q146) How many times does cytokinesis take place during meiosis ? Show Answer

Q147) In which stage do chromosomes appear as thin long threads ? Show Answer

Q148) Chromosome number is restored by Show Answer

Q149) The four daughter cells produced at the end of meiosis are Show Answer

Q150) Diploid chromosome number is 8. What shall be the number of chromatids in each daughter cell after meiosis I ? Show Answer

Q151) The haploid condition is produced by Show Answer

Q152) DNA content is doubled during Show Answer

Q153) The sequence of cell cycle is Show Answer

Q154) How many mitotic divisions are required to form 64 cells from one cell ? Show Answer

Q155) Which of the following represents the best stage to view the shape, size and number of chromosomes ? Show Answer

Q156) Out of the following which is NOT a correct pair ? Show Answer

Q157) If a somatic cell of a plant contains 24 chromosomes, the number of chromosomes present in the gamete will be Show Answer

Q158) Correct sequence of various stages of prophase I is Show Answer

Q159) For the formation of 120 pollen grains how many reduction divisions are required ? Show Answer

Q160) 200 eggs are produced by _______ meiotic divisions. Show Answer

Q161) Which one of the following is the CORRECT pairing with reference to prophase I of meiosis ? Show Answer

Q162) What is the number of chromosome in a diploid organism in which N=12, at the end of meiosis I ? Show Answer

Q163) Number of chromosome groups at the equator of metaphase I of a plant cell, if 2N=60 chromosomes, will be Show Answer

Q164) Which part of the cell divides first during cell division ? Show Answer

Q165) In multicellular organisms, which type of cell division gives rise to tissues ? Show Answer

Q166) Growth of a cell occurs during: Show Answer

Q167) In which phase proteins for spindle fibre formation are synthesized? Show Answer

Q168) In the somatic cell cycle: Show Answer

Q169) DNA synthesis takes place in: Show Answer

Q170) DNA duplication occurs in: Show Answer

Q171) During a cell cycle, the DNA undergoes replication: Show Answer

Q172) In cell cycle, DNA replication takes place in: Show Answer

Q173) During cell cycle, the DNA replication occurs in: Show Answer

Q174) DNA duplication takes place during: Show Answer

Q175) In the somatic cell cycle Show Answer

Q176) Which one of the following precedes
reformation of the nuclear envelope during
M phase of the cell cycle? Show Answer

Q177) Synapsis occurs between Show Answer

Q178) During mitosis, ER and nucleolus begin to
disappear at Show Answer

Q179) Select the correct option with iMpit; to
mitosis. Show Answer

Q180) At metaphase attached to the spindle
fibres by their Show Answer

Q181) During gamete formation, the enzyme
recombinase participates during Show Answer

Q182) In meiotic cells, homologous chromosomes
synapse during Show Answer

Q183) How many generations of mitosis are
required to produce 128 cells from a single
cell of a root tip ? Show Answer

Q184) During diplotene stage in meiosis Show Answer

Q185) Select the correct sequence of stages of
meiotic-I prophase Show Answer

Q186) In cell cycle, different phases are in the
following sequence Show Answer

Q187) Genetic recombination during meiosis takes
place at Show Answer

Q188) Which is not true for anaphase ? Show Answer

Q189) In which phase proteins for spindle fibre
formation are synthesized ? Show Answer

Q190) In pachytene stage of meiosis, the
chromosomes appear Show Answer

Q191) In mitosis, nucleolus and nuclear membrane
disappears at Show Answer

Q192) Formation of bivalent during meiosis occurs
at Show Answer

Q193) The process of cytokinesis refers to the
division of Show Answer

Q194) Which of the following is the longest phase
of meiosis? Show Answer

Q195) Given : (1) chromatid, (2) monad, (3) dyad,
(4) daughter chromosomes. During mitosis
the correct sequence of stages passed
through is Show Answer

Q196) Meiosis I is reductional division. Meiosis II
is equational division due to Show Answer

Q197) Mitotic anaphase differs from metaphase
in possessing Show Answer

Q198) In meiosis, the daughter cells differ from
parent cell as well as amongst themselves
due to Show Answer

Q199) Number of chromatids at metaphase is Show Answer

Q200) Meiosis II performs Show Answer

Q201) In a somatic cell cycle, DNA synthesis takes
place in Show Answer

Q202) Which statement best explains the
evolutionary advantage of meiosis? Show Answer

Q203) When paternal and maternal chromosomes
change their materials with each other in
cell division this event is called Show Answer

Q204) During cell division in apical meristem, the
nuclear membrane appears in Show Answer

Q205) Spindle fibre unite with which structure of
chromosomes? Show Answer

Q206) Best material for the study of mitosis in
laboratory is Show Answer

Q207) The second meiotic division leads to Show Answer

Q208) In meiosis, chromosome number becomes Show Answer

Q209) Consider the following statements about plant cytokinesis
I. It usually occurs by cell plate method
II. The spindle usually persists during cytokinesis
III. Cell plate grows centrifugally
Which of the statements given above are correct? Show Answer

Q210) I. …A… phase corresponds to the interval between mitosis and initiation of DNA replication
II. In animal cells, during the …B… phase, DNA replication begins in the nucleus and the centriole duplicates in the cytoplasm
III. During the …C… phase, proteins are synthesized for the preparation of mitosis, while cell growth continues
Identify the blanks (A-C) to complete the given statements (I-III) with reference to NCERT textbook Show Answer

Q211) Which type of cell division helps in regeneration of cells? Show Answer

Q212) Which of the following statement(s) is/are not correct about meiosis?
I. Meiosis involves pairing of homologous chromosomes and recombination between them
II. Two diploid cells are formed at the end of meiosis-II
III. Meiosis involves two sequential cycles of nuclear and cell division called meiosis-I and meiosis-II, but only a single cycle of DNA replication
IV. Meiosis-I is initiated after the parental chromosome replication which produce identical sister chromatids at the S-phase
The correct option is Show Answer

Q213) Crossing over occurs during Show Answer

Q214) During meiosis, the alleles of the parental pair separate or segregated from each other. How many allele(s) is/are then transmitted to a gamete? Show Answer

Q215) The morphology of chromosomes can be studied most easily in Show Answer

Q216) The number of chromosomes becomes half in Show Answer

Q217) In which of the following phase of cell cycle, mitotic division got arrested? Show Answer

Q218) If a cell has a twice as much DNA as in a normal functional cell it means that the cell Show Answer

Q219) Which of the following phase of cell cycle is also known as the resting phase? Show Answer

Q220) Differentiated cell remains at which stage? Show Answer

Q221) Choose the correct combination of options to select the correct statement for prophase
I.Chromosomal material condenses to form compact mitotic chromosomes
II.The assembly of mitotic spindle is initiated by the microtubules
III.Cells do not show organelles when viewed under the prophase
IV.The nucleolus or nucleoli degenerate completely Show Answer

Q222) Which of the following event distinguishes prophase-I of meiosis from prophase of mitosis? Show Answer

Q223) During mitosis, number of chromosomes gets Show Answer

Q224) I. Chromosomes cluster at opposite spindle poles their identity is lost as discrete elements
II.Nuclear envelope assembles around the chromosome clusters
III.Nucleolus, Golgi complex and ER reform Above features indicates which phase of mitosis Show Answer

Q225) What would be the change in the chromosome number, during S-phase? Show Answer

Q226) Arrange the following events of meiosis in a correct sequence and choose the correct option
I.Terminalisation
II.Crossing over
III.Synapsis
IV.Disjunction of genomes Show Answer

Q227) What is the approximate percentage duration of cell cycle that comes under interphase in humans? Show Answer

Q228) Which of the following stage of meiosis is responsible for deciding genetic constitution of gametes? Show Answer

Q229) …A…. mitotic cell division is only seen in the diploid somatic cells, while the …B… can show mitotic divisions in both haploid and diploid cells.
Identify A and B form the options given below Show Answer

Q230) In meiosis, the chromosome number Show Answer

Q231) The phase between two successive M-phase is called Show Answer

Q232) At the end of meiosis-II, number of haploid cells formed are Show Answer

Q233) The transition between meiosis-I and meiosis-II is Show Answer

Q234) Synapsis occurs between Show Answer

Q235) In which stage of cell division, chromosomes are most condensed? Show Answer

Q236) During cell division, sometimes there will be failure of separation of sister chromatids. This event is called Show Answer

Q237) Which type of chromosomes segregate when a cell undergoes meiosis? Show Answer

Q238) Crossing over that results in genetic recombination in higher organisms occurs between Show Answer

Q239) In which of the following stage of the cell cycle, the attachment of spindle fibres to kinetochores of chromosomes occurs? Show Answer

Q240) The sequence of events by which a cell duplicates its genome, synthesizes the other constituents of the cell and eventually divides into two daughter cells is termed as Show Answer

Q241) In animal cell has, cytokinesis involves Show Answer

Q242) Which is correct for meiotic metaphase-I? Show Answer

Q243) Crossing over is the exchange of genetic material between Show Answer

Q244) Which of the following phase of the cell cycle is not a part of interphase? Show Answer

Q245) Small disc-shaped structures at the surface of the centromeres that appear during metaphase are Show Answer

Q246) The stage between two meiotic division is called Show Answer

Q247) Chromosome number can be doubled by using which of the following? Show Answer

Q248) Which of the following is unique to mitosis and not a part of meiosis? Show Answer

Q249) During which stage of meiosis, do tetrads line up at the equator? Show Answer

Q250) A cell plate is laid down during Show Answer

Q251) During which stage of meiosis, do the sister chromatids begin to move towards the poles? Show Answer

Q252) In a cell cycle, which structures serves as the site of attachment of spindle fibres? Show Answer

Q253) Chromosomes are visible with chromatids at which phase of mitosis? Show Answer

Q254) Give the name of the phases of meiosis, in which
I.the chromosome number is reduced to haploid state
II.the amount of DNA is reduced to haploid state The correct option is Show Answer

Q255) What type of cell division takes place in the functional megaspore initially in angiosperms? Show Answer

Q256) Which of the following statements are correct for multicellular cell division?
I.Cell division brings about embryonic development and growth
II.It plays a role in repair and maintenance of the body
III. It is important for reproduction The correct option is Show Answer

Q257) Meiosis involves two sequential cycles of …A… called meiosis-I and meiosis-II but only a single cycle of …B…
Identify A and B to complete the given statement Show Answer

Q258) DNA replicates Show Answer

Q259) Select the correct sequence of a cell cycle Show Answer

Q260) Mitosis or the equational division is usually restricted to …A… cells. However, in some lower plants and in some social insects …B… cells also divide by mitosis.Choose the correct option for A and B from the given options Show Answer

Q261) The spindles are formed of Show Answer

Q262) During mitosis, ER and nucleolus begin to disappear at Show Answer

Q263) The plane of alignment of chromosome at the metaphase stage of cell cycle is referred to as the Show Answer

Q264) From the following, identify the two correct statements with reference to meiosis
I. Bead-like structures are absent on chromosomes
II. Displacement of chiasmata occurs in diakinesis
III. Separation of two basic sets of chromosomes
IV. No division of centromere The correct option is Show Answer

Q265) Separation of linked genes is called Show Answer

Q266) Sequence of four phases of cell cycle is Show Answer

Q267) The division of the cytoplasm is termed as Show Answer

Q268) The two chromatids of a metaphase chromosome represent Show Answer

Q269) In the process of mitotic division during interphase, chromosome material remains in the form of very loosely coiled threads called Show Answer

Q270) Which of the following occurs more than one and less than five in a chromosome? Show Answer

Q271) Longest phase of meiosis, is Show Answer

Q272) Crossing over is also an enzyme mediated process and the enzyme involved is called Show Answer

Q273) Which one of the following stages corresponds to Mendel’s law of independent assortment? Show Answer

Q274) Which stages of mitosis is known for occurrence of cytokinesis? Show Answer

Q275) Characteristic of meiosis is Show Answer

Q276) The number of mitotic cell divisions required to produce 256 cells from single cell would be Show Answer

Q277) The second check point in cell cycle occurs at Show Answer

Q278) The M-phase starts with the …A…, corresponding to the separation of daughter chromosomes, known as …B… and usually ends with division of cytoplasm which is known as …C… Identify A-C to complete the given NCERT statement Show Answer

Q279) DNA replication in a cell cycle occurs during Show Answer

Q280) When parental and maternal chromosomes change their material with each other in cell division, this event is called Show Answer

Q281) Chiasmata are most appropriately observed in meiosis during Show Answer

Q282) In which of the following stages, the chromosome is single thin and like long thread? Show Answer

Q283) From the following, identify the two correct statements with reference to meiosis
I.Bead like reference to meiosis
II.Displacement of chaismata occurs in diakinesic
III. Separation of two basic sets of chromosomes
IV. No division of centromere
The correct option is Show Answer

Q284) Which of the following stage of cell cycle is known as quiescent stage? Show Answer

Q285) At which stage of mitosis, chromatids separated and passes to different poles? Show Answer

Q286) When dividing cells are examined under a light microscope, chromosomes become visible in Show Answer

Q287) Phenomenon of crossing over in diploid organisms is responsible for Show Answer

Q288) Karyokinesis refers to the division of Show Answer

Q289) Which of the following statements are correct for cell cycle?
I. Cell cycle is the sequence of events involving growth and division of a cell from the time of its formation to its own division into daughter cells
II. Cell growth (in terms of cytoplasmic increase) is a continuous process
III. DNA synthesis occurs only during one specific stage in the cell cycle
IV. The replicated chromosomes (DNA) are distributed to daughter nuclei during cell division Show Answer

Q290) In which stage of the first meiotic division, two sister chromatids are formed? Show Answer

Q291) Mitosis usually results in the Show Answer

Q292) Which of the following type of cell cycle is known as equational division? Show Answer

Q293) The complete disintegration of nuclear envelope in a cell cycle marks the Show Answer

Q294) Chromosomes are arranged along the equator during Show Answer

Q295) When synapsis is complete all along the chromosome, the cell is said to have entered a stage called Show Answer

Q296) ‘XX’ is a phase of mitosis, in which the chromatin condenses into discrete chromosomes. During ‘XX’ phase, nuclear envelope breaks down and spindles forms at opposite ends of the cell.Identify ‘XX’ Show Answer

Q297) Mitosis is divided into Show Answer

Q298) Which of the following statements (events) is/are true for mitotic telophase? Show Answer

Q299) Identify A-C in the given statements, and choose the correct option
I. Spindle microtubules that extend from the two poles of a dividing cell are called …A…
II. A centromere connects two identical copies of a single chromosomes. These two copies are called …B…
III. In ‘X’ phase, the paired chromosomes separate and begin moving to opposite ends of the cell. This ‘X’ is called …C… Show Answer

Q300) The interphase is divided into three main phases. There phases are Show Answer

Q301) In which of the following stages of the cell cycle chromosome number becomes half? Show Answer

Q302) Which of the following specie’s haploid cell has maximum chromosome counts? Show Answer

Q303) Which one of the following precedes re-formation of the nuclear envelope during M-phase of the cell cycle? Show Answer

Q304) Synaptonemal complex is formed during Show Answer

Q305) During cell division, chromosome attaches with spindles Show Answer

Q306) The non-sister chromatids twist around and exchange segments with each other during Show Answer

Q307) Two basic stages of cell cycle are Show Answer

Q308) The S-phase of cell cycle is characterized by Show Answer

Q309) Find the correctly matched pairs and choose the correct option
I. Leptotene – The chromosomes become invisible
II. Zygotene – Pairing of homologous chromosomes
III. Pachytene – Dissolution of the synaptonemal complex takes place
IV. Diplotene – Bivalent chromosomes appear as tetrads
V. Diakinesis – Terminalisation of chiasmata takes place Show Answer

Q310) Meiosis occurs in which of the following cells? Show Answer

Q311) In …A…. phase, there is synthesis of RNAs and proteins that are needed for cell growth and replication of DNA. While it is …B… phase, where synthesis of protein occur that is needed for spindle formation and mitosis to continue.Identify A and B to complete the given statement Show Answer

Q312) Read the following statements and select the correct option
I. M-phase represents the phase when the actual cell division or mitosis occurs
II. Interphase represents the phase between two successive M-phases
III. In the 24 hrs average duration of cell cycle of a human cell, cell division proper lasts for only about an hour
IV.The M-phase lasts more than 95% of the duration of cell cycle Show Answer

Q313) What change would occur in DNA content, during S-phase? Show Answer

Q314) In meiosis, the daughter cells are not similar to that of parent because of Show Answer

Q315) In meiosis, division is Show Answer

Q316) 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

Q317) In cell cycle, during which phase chromosomes are arranged at equatorial plate? Show Answer

Q318) When number of chromosomes is already reduced to half in the first reductional division of meiosis, what is the necessity of second meiotic division? Show Answer

Q319) Select the correct option Show Answer

Q320) During meiotic division, the Show Answer

Q321) Recombination is involved in the process of Show Answer

Q322) A diploid living organism develops from zygote by which type of the following repeated cell divisions? Show Answer

Q323) Pick out the correct statements
.I.Synapsis of homologous chromosomes takes place during prophase-I of meiosis. II.Division of centromeres takes place during anaphase-I of meiosis.
III.Spindle fibres disappear completely in telophase of mitosis.
IV.Nucleoli reappear at telophase-I of meiosis. Show Answer

Q324) After the separation of centromeres during mitosis, the chromatids move towards opposite poles of the spindle. Name the term used for these chromatids Show Answer

Q325) In which phase, proteins for spindle fibre are synthesized? Show Answer

Q326) In meiosis-I, a bivalent is an association of Show Answer

Q327) Chiasmata are formed due to Show Answer

Q328) Which of the following shows diplotene stage of cell cycle? Show Answer

Q329) Select the event of cell cycle which shows the importance of synapsis and the formation of chiasmata Show Answer

Q330) Mitosis is a process by which eukaryotic cells Show Answer

Q331) Mitosis is characterized by Show Answer

Q332) Choose the correct sequence of two main events in mitosis Show Answer

Q333) What is the correct sequence of the steps given here? Also work out the process depicted in the steps?
I. Homologous chromosomes move toward opposite poles of the cell; chromatids do not separate.
II. Chromosomes gather together at the two poles of the cell and the nuclear membrances reform.
III. Homologous chromosomes pair and exchanges segments.
IV. Homologous chromosomes align on a central plate.
V. The haploid cells separate completely. Show Answer

Q334) What is the nature of cells formed at the end of meiosis-II? Show Answer

Q335) The major event that occurs during the anaphase of mitosis, which brings about the equal distribution of chromosomes is Show Answer

Q336) What is the function of centromere? Show Answer

Q337) The cell cycle of yeast takes about Show Answer

Q338) What is not seen during mitosis in somatic cells? Show Answer

Q339) Arrange the following events of meiosis in the correct sequence.
1.Terminalization
2..Crossing over
3.Synapsis
4.Disjunction of genomes
The correct sequence is

Show Answer

Q340) Diakinesis is marked by Show Answer

Q341) Cleavage is a unique form of mitotic cell division in which Show Answer

Q342) Meiosis occurs in organism during Show Answer

Q343) Chromosome reaches their respective poles in which of the following stages of mitosis? Show Answer

Q344) Replication of centriole occurs during Show Answer

Q345) Pick out the correct statements.
I.Mitosis takes place in the somatic cells and meiosis takes place in the germ cells
II. During mitosis, the DNA replicates once for one cell division and in meiosis the DNA replicates twice for two cell divisions.
III. Mitosis and meiosis occur both in sexually and asexually reproducing organisms. Show Answer

Q346) Chromatid formation takes place in Show Answer

Q347) 56 cells are produced in meiosis where first division is Show Answer

Q348) A cell in post reproductive stage remains in Show Answer

Q349) Which of the following character is related with telophase? Show Answer

Q350) The structure that become double in synthesis phase of cell division is/are Show Answer

Q351) In which phase of meiosis-I the two chromosome can align at the metaphase plate independently of each
other Show Answer

Q352) Equatorial division and reductional division takes place in which types of cell division Show Answer

Q353) Which is true about meiotic cell division?
I. Meosis only occurs in diploid organism without any exception
II. RNA is replicated during S-phase
III. Chromatids of a chromosome separate during anaphase-I
IV. Only sperms are produce by this process Show Answer

Q354) What is the main function of the spindle fibers during mitosis?
Show Answer

Q355) Select correct sequence of substages of Prophase-I of Meiotic division :
(A) Zygotene
(B) Pachytene
(C) Diakinesis
(D) Leptotene
(E) Diplotene
Choose the correct answer from the options given below : Show Answer

Q356) Given below are two statements:
Statement I: Failure of segregation of chromatids during cell cycle
resulting in the gain or loss of whole set of chromosome in an organism
is known as aneuploidy.
Statement II: Failure of cytokinesis after anaphase stage of cell division
results in the gain or loss of a chromosome is called polyploidy.
In the light of the above statements, choose the correct answer from the
options given below: Show Answer

Q357) Spindle fibers attach to kinetochores of chromosomes during Show Answer

Q358) Given below are two statements:
Statement I : Chromosomes become gradually visible under light
microscope during leptotene stage.
Statement II : The beginning of diplotene stage is recognized by
dissolution of synaptonemal complex.
In the light of the above statements, choose the correct answer from the
options given below: Show Answer

Q359) Following are the stages of cell division :
A. Gap 2 phase
B. Cytokinesis
C. Synthesis phase
D. Karyokinesis
E. Gap 1 phase
Choose the correct sequence of stages from the options given below : Show Answer

Q360) Among eukaryotes, replication of DNA takes place in Show Answer

Q361) Which of the following stages of meiosis involves division of
centromere? Show Answer

Q362) The process of appearance of recombination nodules occurs at which
sub stage of prophase I in meiosis? Show Answer

Q363) Select the correct statements.
A. Tetrad formation is seen during Leptotene.
B. During Anaphase, the centromeres split and chromatids separate.
C. Terminalization takes place during Pachytene.
D. Nucleolus, Golgi complex and ER are reformed during Telophase.
E. Crossing over takes place between sister chromatids of homologous
chromosome.
Choose the correct answer from the options given below: Show Answer

Q364) Given below are two statements:
Statement I : During G0 phase of cell cycle, the cell is metabolically
inactive.
Statement II : The centrosome undergoes duplication during S phase of
interphase.
In the light of the above statements, choose the most appropriate
answer from the options given below: Show Answer

Q365) The dissolution of synaptonemal complex occurs during : Show Answer

Q366) Doubling of the number of chromosomes can be achieved by disrupting
mitotic cell division soon after: Show Answer

Q367) During which stages of mitosis and meiosis, respectively does the
centromere of each chromosome split? Show Answer

Q368) Which one of the following is the quiescent stage of cell cycle? Show Answer

Q369) Which stage of meiosis can last for months or years in the oocytes of
some vertebrates? Show Answer

Q370) In meiosis, crossing over and exchange of material between homologous
chromosomes catalyzed by the enzyme: Show Answer

Q371) Identify the correct sequence of events during Prophase I of meiosis:
(a) Synapsis of homologous chromosomes
(b) Chromosomes become gradually visible under microscope
(c) Crossing over between non-sister chromatids of homologous
chromosomes
(d) Terminalisation of chiasmata
(e) Dissolution of synaptonemal complex
Choose the correct answer from the options given below: Show Answer

Q372) Bivalent or Tetrad formation is a characteristic feature observed during: Show Answer

Q373) With respect to metaphase, which of the following statements is
incorrect? Show Answer

Q374) Which one of the following never occurs during mitotic cell division? Show Answer

Q375) The appearance of recombination nodules on homologous chromosomes
during meiosis characterizes : Show Answer

Q376) Regarding Meiosis, which of the statements is incorrect? Show Answer

Q377) Select the incorrect statement with reference to mitosis: Show Answer

Q378) The fruit fly has 8 chromosomes (2n) in each cell.
During interphase of Mitosis if the number of chromosomes at G1 phase
is 8, what would be the number of chromosomes after S phase? Show Answer

Q379) The centriole undergoes duplication during: Show Answer

Q380) Which stage of meiotic prophase shows terminalisation of chiasmata as its distinctive feature? Show Answer

Q381) Some dividing cells exit the cell cycle and enter vegetative inactive
stage. This is called quiescent stage (G0). This process occurs at the end
of Show Answer

Q382) dentify the correct statement with regard to G1 phase (Gap 1) of
interphase. Show Answer

Q383) Dissolution of the synaptonemal complex occurs during Show Answer

Q384) Meiotic division of the secondary oocyte is completed Show Answer

Q385) Cells in G0 phase : Show Answer

Q386) The correct sequence of phases of cell cycle is: Show Answer

Q387) Crossing over takes place between which chromatids and in which stage
of the cell cycle? Show Answer

Q388) After meiosis I, the resultant daughter cells have Show Answer

Q389) The stage during which separation of the paired homologous
chromosomes begins is Show Answer

Q390) Which of the following options gives the correct sequence of events
during mitosis? Show Answer

Q391) Anaphase Promoting Complex (APC) is a protein degradation machinery
necessary for proper mitosis of animal cell. If APC is defective in a
human cell, which of the following is expected to occur? Show Answer

Q392) During cell growth, DNA synthesis takes place on Show Answer

Q393) When cell has stalled DNA replication fork, which checkpoint should be
predominantly activated? Show Answer

Q394) Spindle fibres attach on to Show Answer

Q395) Which of the following is not a characteristic feature during mitosis in
somatic cells? Show Answer

Q396) In meiosis crossing over is initiated at Show Answer

Q397) Arrange the following events of meiosis in correct sequence
(i) Crossing over
(ii) Synapsis
(iii) Terminalisation of chiasmata
(iv) Disappearance of nucleolus Show Answer

Q398) A somatic cell that has just completed the S phase of its cell cycle, as
compared to gamete of the same species, has Show Answer

Q399) Non-membrane bound cell organelles found in both prokaryotic and eukaryotic cells are
Show Answer

Q400) Choose the correct statements regarding cell organelles and their inclusions.
A. The endomembrane system includes Golgi complex, endoplasmic reticulum and mitochondria.
B. Rough endoplasmic reticulum bears ribosomes on its surface.
C. Both mitochondria and plastids have circular DNA.
D. A network of microtubules, microfilaments and intermediate filaments present in the cytoplasm is called cytoskeleton.
E. Mitochondrion is a single membrane-bound structure.
Choose the correct answer from the options given below:
Show Answer