Practice Test


1) Cellular pool is made up of


2) Carbohydrates, proteins and lipids form


3) The term 'metabolism' indicates a variety of reactions carried out at


4) Biosynthesis of cellular material is


5) Which of the following is not true ?


6) Micro molecules do not include


7) Nucleic acids are


8) Chlorophyll containing cells produce ________ in presence of light.


9) Which of the following is not a component of carbohydrates ?


10) The proportion of oxygen and hydrogen in carbohydrate is


11) The general formula for complex carbohydrates is


12) HCHO is a/an


13) Rhamnose is


14) Cellulose is


15) Which of the following is a characteristic of carbohydrates ?


16) Fructose is


17) Carbohydrates are classified on the basis of


18) Which of the following form the basic units of carbohydrates ?


19) Which of these cannot be hydrolysed further ?


20) Monosaccharides are the basic units of


21) Monosaccharides are further classified based on the


22) The sugar which acts as a respiratory substrate in plants as well as in animals is


23) Which of the following is correct statement ?


24) Ribulose is


25) Xylose is


26) Glyceradehyde is a


27) Ribose and deoxyribose are


28) Erythrose is ________ sugar.


29) The simplest monosaccharide made up of three carbon atoms amongst the following is


30) Disaccharide is made up of


31) Disaccharides are formed by a _________ bond between two monosaccharides.


32) Disaccharides are formed by monosaccharide units by the


33) Glucose and fructose condense to form


34) Lactose sugar found in milk is a


35) Cane sugar of table is


36) The sugar found in mammalian milk is


37) Formation of polysaccharides from large number of monosaccharides is


38) Polysaccharides are


39) Cellulose and starch are


40) General formula of polysaccharides is


41) The 'n' present in general formula of polysaccharides represents the


42) Hyaluronic acid is present in which of the following mammalian organs ?


43) Which one of the following is a heteropolysaccharide ?


44) The sugar found as reserve food in grapes is


45) The sugar found in the medullary sheath of nerve fibers is


46) The sugar found in nectar and honey is


47) Which of the following statement is true ?


48) Glycans are


49) _________ is animal starch


50) A homopolysaccharide containing polymer of galactose and used as a base for culture media.


51) Which among the following is a heteropolysaccharide ?


52) Fungal cellulose also found in the exoskeleton of crabs, prawns etc is


53) Cell wall of bacteria and cyanobacteria is formed of


54) A heteropolysaccharide anti-coagulant found in blood is


55) Proteins are the long chain polymers of


56) The term 'Protein' is derived from the Greek word 'Proteious' which means


57) The term 'Protein' was coined by


58) Proteins


59) The molecular weight of haemoglobin is


60) The difference among species is due to the difference in its ________ components.


61) The number of proteins in a bacterial cell is over


62) The number of proteins in human cells is over


63) Proteins do not have


64) The total number of amino acids is


65) The total number of essential amino acids which can not be synthesized by organisams within their body is


66) A peptide bond is formed between _______ and _________ of two amino acids respectively.


67) Amino acids are amphoteric in nature. This means that


68) The bond between two amino acid molecules in proteins is


69) Peptide bond is formed by ________ of water molecules between two amino acids.


70) In a polypeptide chain, the end containing free amino group is


71) During elongation of polypeptide chain, an new amino acid can be added at


72) The polypeptide chains are folded using


73) Proteins having only amino acids or their derivatives are


74) Proteins having only amino acids with non-protein prosthetic group are


75) Find the FALSE statement.


76) The protein present in hair and skin is


77) The protein present in muscles is


78) The protein present in the cell membrane of animals is


79) Muscles contract with help of


80) Coagulation or clotting of blood occurs due to


81) The protein in blood which gives resistance to diseases is


82) A simple protein zein is found in


83) Histone proteins are


84) Histone proteins are associated with


85) Egg yolk contains _______ in large quantities.


86) The term 'Lipid' was coined by


87) Lipids are


88) which of the following is TRUE about lipids ?


89) Waxes are produced by


90) Lipids contain


91) Chemically lipids are


92) The proportion of hydrogen : Oxygen in lipids is


93) Lipids contain


94) Lipids contain


95) Which of the following is not type of lipid ?


96) Fatty acids has a


97) Triglycerides contain


98) Triglycerides are


99) Simple lipids are further classified on the basis of number of


100) The saturated fatty acids have


101) The unsaturated fatty acids have


102) Find the FALSE statement about unsaturated fats


103) Find the True statement about saturated fats.


104) Compound lipid contain


105) Lipids present in the cell membrane are


106) Which of the following is a hydrolytic product of lipids ?


107) Each molecule of a steroid has carbon atoms arranged in ________ interlocking rings.


108) Which of the following is a derived lipid with four interlocking rings ?


109) The steroid component present in bile salt is


110) The precursor of sex hormone is


111) Which of the following is required for vitamin D synthesis ?


112) Plant waxes do not contain


113) Plant waxes contain


114) Plant waxes


115) Plant waxes are secreted by ________ layer.


116) Carotenoids contain


117) Carotenoids are


118) Carotenoids mainly help in the process of


119) Carotenoids are present in


120) Carotenoids are found in


121) Fredrick Meischer


122) The term 'nucleic acid' was coined by


123) Fredrick Meischer coined the term


124) Meischer discovered nucleic acids from


125) Genetic material in viruses is


126) Nucleic acids occur in


127) In the cells, nucleic acids occur in


128) Nucleic acids are


129) Purines are


130) Pyrimidines are


131) Nitrogen bases in DNA are


132) The nitrogenous bases are linked to sugar by


133) DNA is acidic in nature due to


134) DNA differs from RNA in


135) Chemically RNA differs from DNA in having


136) The similarity between DNA and RNA is that, they have


137) Sugar and nitrogen base linked by glycosidic bond is known as


138) Phosphoric esters of nucleosides are known as


139) A complex formed by de-oxyribose sugar, phosphate and nitrogen base is


140) A nucleotide treated with enzyme phosphate will yield


141) A nitrogen base with a double ring can be attached to a pentose sugar in


142) Which of the following exist in pairs in DNA ?


143) Phosphodiester linkage is present between


144) Which of the following are complementary nitrogen bases ?


145) The complementary nitrogen bases in DNA are joined by


146) Purine and Pyrimidine ratio is


147) X-ray diffraction studies of DNA was performed by


148) Who had proposed the double helix structure of DNA ?


149) According to Watson and Crick, DNA


150) The two strands of DNA are


151) In a DNA molecule, which of the following statement is not true ?


152) In eukaryotic cell, DNA is found in


153) DNA contains all the information needed for


154) Which of the following is a FALSE statement about DNA ?


155) The genetic material in most plant viruses is


156) RNA is


157) The hereditary material in tobacco mosaic virus is a


158) The hereditary material in tobacco mosaic virus was discovered by


159) DNA and RNA are similar as they both


160) Which of the following is not found in RNA ?


161) Which of the following contains uridylic acid ?


162) In RNA,


163) m-RNA, t-RNA and r-RNA are they types of


164) m-RNA, t-RNA and r-RNA are present in the organisms which have


165) The non-genetic RNA formed from


166) Which of the following is a linear molecule ?


167) Which of the following is a linear molecule folded at certain regions ?


168) Which of the following has a hair pin structure ?


169) Which of the following has a clover leaf structure ?


170) The smallest non-genetic RNA is


171) The longest non-genetic RNA is


172) The most abundant non-genetic RNA is


173) The least abundant non-genetic RNA is


174) Which of the following is soluble RNA ?


175) m-RNA forms about _________ of the total cell RNA.


176) r-RNA forms about _________ of the total cell RNA.


177) _________forms about 10-15% of the total cell RNA.


178) The process of transcription produces


179) A = U is present in


180) __________ carries activated amino acids to ribosomes.


181) The most active RNA during translation is


182) Maximum amount of RNA is present in


183) The term 'enzyme' was coined by


184) The word 'enzyme' means


185) The first person to isolated urease in pure crystalline form was


186) Urease was isolated in a crystalline form from


187) The enzymes which are produced and act at the same site are


188) The enzymes which are produced at one side but act far away are


189) Enzymes


190) What is not TRUE about enzymes ?


191) Chemically most of the enzymes are


192) Enzymes can react with


193) Enzymes have


194) A single enzymes can act on


195) The molecule of an enzyme is ________ the molecule of substrate.


196) The specific part of enzyme molecule which comes in contract with the substrate molecule is


197) The enzyme invertase acts on


198) The enzyme urease acts on


199) Enzymes are


200) The gel like nature of enzymes provide a


201) In enzymes, the size of dispersion medium is _______ the size of dispersion particles.


202) Enzyme optima includes


203) Which of the following effect does temperature have on enzyme activity ?


204) If an enzyme is frozen and kept below its freezing point, it is


205) __________ increase in temperature increases enzyme activity.


206) Most of the intracellular enzymes are active at


207) In which of these conditions enzymes do not get denatured ?


208) Enzymes are denatured when the ________ bonds are broken.


209) Normally enzymes are proteins. The non protein enzyme is


210) The substance which acts as a competitive inhibitor of enzymes


211) The competitive inhibition of enzymes


212) The substance which acts as a non-competitive inhibitor of enzymes


213) The non-competitive inhibition of enzymes


214) The enzymes can be poisoned by


215) In cyanide poisoning, the inhibitor


216) Cellular pool is


217) Which of the following about monosaccharides is UNTRUE ?


218) Trioses, tetroses and pentose are


219) Maltose is


220) The carbohydrate forming 90% of cotton fibers, 20-25% wood and paper from paper pulp is


221) Which of the following statement about protein is UNTRUE ?


222) The simplest amino acid is


223) Phenylalanine, tyrosine, proline are


224) Which of the following is statement INCORRECT ?


225) Find the CORRECT statement.


226) The FALSE statement about lipids is


227) Find the ODD one out.


228) As compared to DNA pentose sugar, the RNA pentose sugar has


229) Find the ODD one out from the following based on its chemical structure.


230) Find the ODD one out with reference to DNA.


231) The phosphate group in nucleic acids is provided by


232) Which of the following is found both in DNA and RNA?


233) Which one of the following is a nucleotide ?


234) Successive nucleotides of the same strand of DNA are joined by


235) Which of the following is TRUE ?


236) The number of adenine molecules in a given DNA segment is 25 and the number of cytosine molecules is 45. The total number of nucleotides in the segment is


237) In a DNA molecule, if the percentage of thymine is 22%, then guanine will be


238) Which staement is not TRUE about enzymes ?


239) The general formula for complex carbohydrates is


240) Lipid are found in acid insoluble fraction during the analysis of chemical composition of tissues. Given the
reason


241) Choose the element which is negligible in living matter


242) Name the plant pigments present in the following
I. Carrots
II. Tomatoes


243) Silk consists of


244) Which statement regarding coenzyme is incorrect?


245) The rate of the reaction doubles or decreases by half, for every… °C change in either direction


246) Enzyme often have additional parts in their structures that are made up of molecules other than
proteins. When this additional chemical part is an organic molecule, it is called


247) Which one is imino acid?


248) The sum total composition of acid soluble and acid insoluble fraction pool represents the


249) The ‘lock’ and ‘key’ model of enzyme action illustrates that a particular enzyme molecule


250) After doing the chemical analysis of organic compounds found in living organisms, two fractions were
observed namely


251) Which one is not an example for hydrolases?


252) Which type of protein is present in human skin?


253) The metabolic flow is called


254) The pyrimidine base, which confers additional stability to DNA over RNA, is


255) If the total amount of adenine and thymine in a double-stranded DNA is 60%, then the amount of
guanine in this DNA will be


256) An enzyme extract when subjected to electric field, separates into two fractions each catalyzing
the same reaction. These fractions are


257) Amino acids the substituted methanes. Name the four substituent groups occupying the four valency positions


258) The ‘lock’ and ‘key’ theory of enzyme structure and function was proposed by


259) Histone octamer contains


260) What is grape sugar?


261) Pepsin is an ……enzyme


262) Which one is a polymer?


263) Which of the following statements are correct?
I. Acetic acid can form cholesterol
II. Flow of metabolites through metabolic pathway has a definite rate and direction. It is called dynamic
state of body constituents
III. Anabolic pathway is endergonic while catabolic pathway is exergonic
IV. All biomolecules have a term over, i. e., they are constantly being changed into some other
biomolecules and also made from other biomolecules
The correct options is


264) Which is a reducing sugar?


265) Formation of glycogen from glucose is called


266) Which of the following statements are correct for polysaccharides?
I. The polysaccharides are found as a part of the acid insoluble pellet
II. These are long chains of sugars
III. They are threads containing different monosaccharides as building blocks
IV. Cellulose is a polymeric polysaccharide consisting of only one type of monosaccharide i. e., fructose


267) Select the false statement
I. Living process is a constant effort to promote falling into equilibrium
II. Energy can enter and leave a cell
III. Matter can enter and leave a cell
IV. Metabolic pathways are interlinked


268) Arachidonic acid is


269) Inulin is a polymer of


270) Table sugar consists of


271) For nucleic acids, the building block is a


272) An example of feedback inhibition is


273) The term metabolism means


274) Chitin is a


275) Richest energy compound is


276) Select the wrong statement.


277) Which of the following is an essential amino acids?


278) The aggregation of the various kinds of biomolecules in a cell is referred to as the


279) Secondary metabolites can be observed in


280) Select the secondary metabolites from the list given below
I. alkaloids
II. flavonoids
III. rubber
IV. essential oils
V. antibiotics
VI. coloured pigments
VII. scents
VIII. gums
IX. spices
Choose the correct option


281) What is the starting point in the production of food?


282) Name the heterocyclic compounds which are known as nitrogenous bases
Choose the most appropriate options


283) In which one of the following enzymes copper is necessarily associated as an activator?


284) The regulation of the chemical composition of blood and body fluids and other aspects of its internal
environment by an organism to maintain the physiological process is called


285) ‘G’ in DNA strand base pairs with ‘C’ by 3… bonds


286) The inhibitor which inhibits the enzyme activity by binding to the active site of the enzyme, due to the
close resemblance to the substrate in its molecular structure is called


287) Select the correct pair of substituted purines


288) Which one of the following is wrongly matched?


289) Enzymes that catalyze inter-conversion of optical, geometrical or positional isomers, are


290) All the carbon compounds obtained from living tissues are named as


291) A fatty acid has a carboxyl group attached to R group. The R group could be a


292) With reference to enzymes, which one of following statements is true?


293) Benedict’s reagent test is conducted to confirm the presence of


294) When a metabolic disequilibrium is in effect, then only cells continue to function
How do cells avoid reaching metabolic equilibrium?


295) Which of the following radioisotope is not suitable for DNA labeling based studies?


296) Jacob and Monod named some enzymes as allosteric, whose activity is regulated by


297) Identify the term ‘ash’ in term of living tissue sample analysis from the statements given below


298) Grinding of a living tissue in trichloroacetic acid shows the presence of the inorganic compounds like
sulphate, phosphate etc, which are categorised in


299) Formation of lactic acid form glucose occurs in… metabolic steps


300) A nucleotide has three chemically distinct compounds. These are A, B and C
Choose the correct option for A, B and C


301) Answer briefly
I. Hydrolysis of glycogen to glucose is termed as?
II. Name the enzyme which takes part in the hydrolysis of glycogen
III. Amylum is an another name of
IV. Name the polysaccharide formed as the end product of the photosynthesis
Correct option with all the answers is


302) Which of the following is not a conjugated protein?


303) …….. is the most abundant protein in whole of the biosphere


304) Which enzyme is useful as colour brightening agent in detergent industry?


305) Locations or sites in the human DNA where single base DNA differences occur, are called


306) An organic substance bound to an enzyme and essential for its activity, is called


307) Choose the correct statements
I. Bond energy (ATP) is utilised for biosynthesis, osmotic and mechanical work that we perform
II. When glucose is degraded into lactic acid in our muscles, energy of liberated
III. Assembly of a proteins from amino acids requires energy
IV. Majority of metabolic reactions can occur in isolation
V. There are many examples of uncatalysed metabolic reactions


308) Maltose consists of which one of the following?


309) Mannitol is


310) Almost all enzymes are … in nature


311) One of the secondary structures exhibited by DNA is…..


312) Feedback inhibition of enzymes is affected by which of the following?


313) All the chemical reactions occurring in living organisms are called


314) Given below are two statements A and B. Choose the correct answer related to the statements.
Statement A Amino acids are amphoteric in their function.
Statement B All amino acids are necessary for our body.


315) The tertiary structure of the proteins containing amino acid cysteine is achieved through


316) Maltose gives rise to two molecules of


317) One of the following is a simple protein.


318) Which of the following statements are correct?
I. Relative abundance of carbon and hydrogen with respect to other elements is higher in any living
organisms
II. Living organisms have more nitrogen and oxygen per unit mass than inanimate objects (e. g., earth
crust
III. All the elements present in a sample of earth’s crust are also present in a sample of living tissue
IV. Living organisms have more Ca, Mg,Na in them than inanimate object


319) Which one is diaminodicarboxylic amino acid?


320) Which of the following statements about enzymes are correct?
I. Enzymes do not alter the overall change in free energy for a reaction
II. Enzymes are highly specific for reactions
III. The energy input needed to start a chemical reaction is called activation energy
IV. Enzymes are proteins whose three dimensional shape is key to their functions


321) Which amino acid is denoted by symbol ‘F’?


322) Which enzyme catalyse the break down of hydrogen peroxide to water and oxygen?


323) Sugar and amino acids are


324) Which of the following statements regarding enzyme inhibition is correct?


325) Enzymes are functional at


326) Cellulose is made up of


327) Which of the following statements is wrong?


328) Name the four elements called ‘Big-four’ which make up 95% of all elements found in a living system


329) Proteins are heteropolymers which are madeup of …… type of monomers of amino acids


330) Catabolic and anabolic pathways are often coupled in cell. Why?


331) Molecular weight of protein is


332) Name the disaccharide which is the major sugar of insect haemolymph


333) One turn of DNA has nucleotide pairs


334) Phospholipids are


335) Why metabolic pathways are comparable to automobile traffic in a city?


336) A bond formed between carboxyl group of one amino acid and amino group of adjacent amino
acid, is called


337) In animal tissues, the categories of compounds present are called


338) Cellulose is a polymer of


339) Proteins with catalytic power are called


340) The enzyme which converts corn starch into fructose rich corn syrup is


341) The globular proteins undergo structural changes, in response to extremes of pH or temperature,
the process called


342) Which of the following is a disaccharide?


343) During Meselson and Stahl’s experiments, heavy DNA was distinguished from normal DNA by
centrifugation in


344) Protein in silk thread is


345) What are proenzymes?


346) Which of the following is the simplest amino acid?


347) Hydrolysis of a glycosidic bond in a disaccharide is an example of


348) Which of the following is non-reducing sugar?


349) Phospholipids are


350) Richest source of protein is


351) Which of the following polysaccharide is present as a store house of energy in plant tissues?


352) Which form of keratin is present in human hair?


353) The most abundant chemical in living organisms is


354) Basic structure of proteins was given by


355) Name the most abundant protein in animal world


356) Which of the following is the example of structural protein?


357) Which of the following statements are incorrect?
I. Left end of a polysaccharide is called non-reducing end while right end is called reducing end
II. Starch and glycogen are branched molecules
III. Starch and glycogen are the reserve food materials of plants and animals, respectively
IV. Starch can hold iodine molecules in its helical secondary structure but cellulose being non-helical,
cannot hold iodine


358) Enzymes catalyses the biochemical reactions by …… the activation energy


359) Answer briefly
I. Which colour glycogen gives on its reaction with iodine solution?
II. What is satellite DNA?
III. Name three components of a nucleotide molecule
Correct option will all answers is


360) The acid soluble pool, roughly represents


361) Choose the type of enzyme involved in the following reaction
S − G + S′ → S + S′ − G


362) Which of the following is an isozyme?


363) Primary metabolites play known roles in


364) Sucrose, a common table sugar is composed of


365) Double sugar is


366) Variety of amino acids are formed on the basis of


367) Carbohydrates, the most abundant biomolecules earth, are produced by


368) Where the starch is stored in the plant cell?


369) The form of DNA with 34Å pitch with a rise per base pair of 3.4Å is called


370) The catalytic efficiency of two different enzymes can be compared by the


371) A competitive inhibitor, competes with the substrate, for the substrate binding site of enzymes due to its


372) The most abundant molecule in cell, is


373) The left handed DNA is called


374) Adult human haemoglobin consists of


375) Which enzyme is most specific?


376) Chemical compounds which are found in the acid insoluble fraction are called


377) Lipids are generally
I. water soluble
II. water insoluble
III. soluble in non-polar organic solvents
IV. not soluble in non-polar organic solvents
Choose the correct options


378) Nucleotides are formed by


379) The substance, which is metal ion essential for the normal functioning of enzyme is called


380) Water molecules are connected by


381) The physical and the chemical compositions of amino acids are essentially of the


382) The proteinaceous molecule that joins a non-proteinaceous prosthetic group to form a functional enzyme
is called


383) Select the correct constituents of protein


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


385) Paraffin wax is


386) Many physiological functions are performed by proteins. One such function involves that some proteins
discharge


387) One full turn of the helical strand involves … steps


388) One strand of DNA has sequence of nucleotide 3’ ATTCGCTAT 5’ then other strand of DNA has


389) In a protein molecule, the amino acid units are linked together by ……... bonds formed between the amino
acid units and the carboxyl group of successive amino acids


390) Identify wheather the given statements are true or false
I. A protozoan contains thousand of organic compounds
II. Concentration of biomolecules in an organism is not fixed


391) Michaelis Menten constant (km) is equal to


392) Which one of the following amino acids was not found to be synthesized in Miller’s experiement?


393) Which of the following amino acids is not optically active?


394) What provides roughage (fibre) in our diet?


395) Starch can be used as an indicator for the detection of traces of


396) Pick the odd statement out


397) Which one is the sweetest sugar?


398) Choose the correct graph showing, the effect of pH on the velocity of a typical enzymatic reaction (V)?


399) In which one of the following sets of three items each belong to the category mentioned against
them?


400) The inhibitor which binds to the enzyme at site other than the active site and do not resemble the
substrate in structure is called


401) Biomolecules are constantly being changed into some other biomolecules and are made from ….


402) A physical change, during a chemical reaction refers to


403) Identify, in which of the following carbon compounds, heterocyclic rings can be found?


404) Hydrolysis of lipid yields?


405) If all the peptide bonds of protein are broken, then the remaining part is


406) In a polysaccharide, the individual monosaccharides are linked by a


407) The free energy of a system, in a spontaneous reaction


408) Inhibition of enzyme activity by a molecule, which reversibly modifies the structure of the active
site of the enzyme is called


409) Pentoses and hexoses are common


410) Which one of the following is polysaccharide?


411) Oxygenic compounds of biological process, which activate chemical reactions are


412) A product of metabolism is called a


413) Starch and cellulose are compounds of many units of


414) According to Watson-Crick model, DNA exists as a …A… . The two strands of polynucleotides are …B… . The
backbone is formed by the sugar …C…, …D… chain. The nitrogen bases are more or less …E… to this
backbone
Choose the correct options for the blanks A, B, C, D and E


415) After grinding a living tissue in trichloroacetic acid and then straining it, you would obtain two fractions :
acid soluble pool and acid insoluble fraction. Acid insoluble fraction does not contains


416) Choose the correct options


417) Which of the following statement(s) are/is correct?
I. In the process of metabolism, all organic biomolecules are constantly being broken down but not being
built up through chemical reactions
II. A product of metabolism in called a metabolite, but not always
III. Metabolism is always known to built up new products
IV. Metabolism is the characteristic feature of non-living things


418) The ‘Repeating unit’ of glycogen is


419) Every chemical (metabolic) reaction is a … reaction


420) Which of the following secondary metabolites are used as drugs?


421) Enzymes are most functional at the temperature range of


422) One of the major feature of metabolic reaction is that they are…


423) Which of these is not a ketone body?


424) Which of the following is not a cell inclusion?


425) Which of the following is incorrect?


426) Identify wheather the given conditions are anabolic or catabolic
I. Glucose → Lectic acid
II. Amino acids → Proteins


427) Choose the correct statement


428) Pick out the wrong statement


429) Each active sites in enzyme is bounded by how many amino acids?


430) Select the wrong statement


431) The simple polyhydroxy ketone molecule containing 3-7 carbons is a


432) Primary structure of proteins is due to the presence of


433) Removal of amino group from an amino acid is known as


434) The tightly bound non-proteinaceous organic compound in enzyme, is


435) Why living state cannot afford to reach equilibrium?


436) Chemical compounds that have molecular weights less than one thousand dalton are usually referred to as


437) Find out the wrongly matched pair.


438) The bond present between two carbohydrate molecules is


439) Enzyme having different molecular arrangement but similar functions is


440) Which is an organic compound found in most cells?


441) Select the correct which represents the homopolysaccharides made up of glucose monomers


442) A high fever is dangerous to humans because


443) All enzymes are basically


444) In a DNA, ‘A’ base pairs with …by… H bonds.
Chooses the correct option for the blanks A and B


445) …… is a heteropolymer


446) Those nucleic acids which behave like enzymes are known as


447) How many of the twenty two amino acids are essential for children?


448) Raffinose is a


449) Example of a typical homopolysaccharide is


450) The aleurone layer in maize grain is specially rich in


451) Ribozymes are ….. molecules that function as biocatalysts in modern cells


452) Types of amino acids found in proteins are


453) Select the correct graph which shows the relationship between the rate of an enzymatic activity and
substrate concentration


454) The effectiveness of an enzyme is affected least by


455) Fluidity of bio-membranes can be shown by


456) A mathematical explanation for enzyme action on substrate was formulated by


457) Insulin is a polymer of


458) What is the approximate percentage of proteins in the cell contents?


459) How does radiations inactivates enzymes?


460) The fastest acting enzyme, in the biological kingdom, is


461) The most important form of energy currency in living organisms is the bond energy in the chemical called
…..


462) An example of competitive inhibition of an enzyme is the inhibition of


463) The amino acids are acidic, basic and neutral based on the number of


464) The type of bond involved in the formation of sodium chloride, is


465) Allosteric modulation is due to inhibition action of enzyme by


466) Cholesterol is considered as a crucial molecule in animals because it is


467) Select the correct option that identifies the nature of apoenzyme and co-factor correctly


468) The double helical model of the DNA was proposed by Watson and Crick based on what data
produced by Wilkins and Franklin?


469) Arrange the steps of catalytic action of an enzyme in order and choose the correct option.
I. The enzyme releases the products of the reaction and the enzyme is free for another
substrate.
II. The active site of enzyme is in close proximity of the substrate and breaks of chemical bonds
of the substrate.
III. The binding of substrate induces the enzyme to alter its shape fitting more tightly around the
substrate.
IV. The substrate binds to the active site of the enzyme fitting into the active site.


470) How many carbon atoms generally take part in the formulation of monosaccharides?


471) Enzymes catalysts differ from inorganic catalysts in which way?


472) Select the correct graph, which shows the effect of temperature on the velocity of a typical enzymatic
reaction


473) Malonate inhibits succinate dehydrogenase, is an example of


474) Which disaccharide has different linkage?


475) Which one of the following is not a fibrillar protein?


476) The rate of physical or chemical process can be defined as


477) Enzymes that catalyses the removal of groups from substrates by mechanism other than hydrolysis,
addition of groups to double bonds are called


478) Which of the following is not a coenzyme?


479) The DNA in which the base sequence of one strand is opposite to that of other strand when read from
opposite direction is called


480) The enzyme part, which combines with non-protein part to form a functional enzyme, is known
as


481) Which of the following statements are true?
I. Genetic RNA occurs in certain viruses called ribovirus
II. RNA of riboviruses may be single stranded
III. Double stranded RNA may also be present in riboviruses


482) Lactose is composed of following components


483) Holoenzyme is a/an


484) One feature common to all the compounds found in the acid soluble pool is


485) Which of the following statements are correct?


486) Statement 1: Anabolism is the process by which the large, complex chemical compounds are built up
from the small simpler compounds in the body of a living organism
Statement 2: Anabolism is an exergonic process. It results in consumption of organic compounds and
decrease in the body weight


487) Given below the two sets of statements
Identify wheather they are correct or incorrect
Statement 1: In living system, all the metabolic conversions are aided by catalysis
Statement 2: The catalysis which hasten the rate of a given metabolic conversation are not proteins


488) Statement 1: A coenzyme or metal ion that is very tightly bound to enzyme protein is called
prosthetic group.
Statement 2: A complete catalytically active enzyme together with its bound prosthetic group is
called apoenzyme.


489) Statement 1: The cellular pool provides all the necessary materials for the structure and functions of a
cell
Statement 2: For the survival of a cell, steady state within the cell is necessary


490) Statement 1: Arachidic acid is an unsaturated fatty acid.
Statement 2: There are one or more double bonds between carbon atoms in unsaturated fatty
acids.


491) Statement 1: Seven amino acids are referred to as essential amino acids for humans
Statement 2: They are essential for human health


492) Statement 1: In healthy state of a living organism, metabolites flow is very smooth and flawless
Statement 2: Metabolities are converted into each other in a series of linked reactions