MULTIPLE CHOICE QUESTIONS ne eee 8. The following structure is for | CHO H—}—OH HoO—}—H Some statements are given below, HO—}-—H a eas 2 aldohexose : HO—}+—H acne es a CH,OH iii) glucose contains three chiral centres a) L-(+)-galactose —_b) L-(+)-glucose iv) glucose contains one 1° alcoholic c) L-(+)-glucose ) L-(+)-mannose group and four 2° alcoholic groups 9. aeDeglucose and B-D glucose differ from each other due Among the above correct statement(s) is /are, to the difference in one of the ‘carbon atom with respect a) (i), (ii) and (iv) b) (i) and (ii to ¢) (iii) and (iv) qd) and (iv) a) configuration Which one of the following sets of monosaccharides b) number of OH-groups forms sucrose )_ conformation a) a-D-Galactopyranose and «-D-Glucopyranose ) size of hemiacetal ring b)_a-D-Glucopyranose and o-D-fructofuranose 10. D-glucose and D-galactose differ in configuration ¢) B-D-Glucopyranose and o-D-fructofuranose at d) a-D-Glucopyranose and B-D-fructofuranose a) Cl b) C2 Choose the correct relationship for glucose and co) C3 d) C4 fructose, 11, Glucose contains in addition to aldehyde group a) these are position isomers” a) One secondary OH and four primary OH groups b) these are chain isomers b) One primary OH and four secondary OH groups ©) these are functional isomers ©) Two primary OH and three secondary OH groups ) these are cis and trans isomers d) Three primary OH and two secondary OH groups Why chalk powder is added after complete | 12. Fructose contains, hydrolysis of starch? a) one ketonic group a) to solidify glucose b) two primary and three secondaryalcoholic b) to neutralize H,SO, groups ¢) to crystallize starch *c) six hydroxyl groups d) to remove CaSO, 4) both ‘a’ and 'b! How many D-isomers are possible for aldohexose 13. Pick out the incorrect statements) from the following 4 b) 6 1) Glucose exists in two different erystalline forms, & 9 8 4) 16 D-glucose and B-D glucose ‘The sugar which on hydrolysis gives two 2) o-D- glucose and P-D-glucose are anomers monosaccharides, with opposite optical rotation is, 3) a-D- glucose and f-D- glucose are enantiomers a) sucrose b) maltose 4) Cellulose is straight chain polysaccharide made of ©) glucose 4) fructose only B-D-glucose units. Carbohydrates were called hydrates of carbon 5) Starch isa mixture ofamylose and amylopectin, bolt because, contain unbranched chain of o-D- glucose units. a) they can be represented by C,(H,0), a) land5. b) Qand3. b) they contain hydrogen and oxygen Q) Band4 ) Sand 5 atoms in the fatio 2: 1 MW ‘The term anomers of glucose refers to ©) both ‘a’ and 'b! a) Isomers of glucose that differ in configuration 4) they contain carbon atoms and water carbons one and four (C-1 and C-4) molecules in the ration 2: 1 b) A mixture of (D)-glucose and (L)J Enantiomers of glucose {Isomers of glucose that differ in configuration at carbon one (C-1) os which of the following monosaccharide is pentos a) arabinose b) galactose c)_ glucose 4d) fructose Which molecule possess the general formula of carbohydrates, but not a carbohydrate? a) glyceraldehyde —_b) acetic acid ¢) arabinose d) glucose Maltose on hydrolysis produces a) B-D-glucose b) a-D- glucose ) BD-fructose 4) a-D-fructose Raffinose on hydrolysis does not forms, a) glucose b) galactose c) fructose ) maltose Which one of the following is isomeric with sucrose? a) lactose b) galactose c) glucose d) fructose To become a carbohydrate, a compound must contain at least, a) 3 carbons ¢) 4 carbons Sorbitol is prepared by a) reduction of sucrose with bromine water b) reduction of sucrose with sodium amalgam ¢) reduction of glucose with sodium amalgam and water 4) reduction of glucose with ZnHg + HC1 ‘Some statements about monosaccharide are given below 1) They are optically active except dihydroxy b) 6 carbons d) 2 carbons acetone 2) Glucose and fructose ae functional isomers 3) Glucose and fructose are optiocal isomers 4) They are represented by the general formula CHy,O, Among the above athe wrong s a) land2 b) 2and 3 ©) only 3 ¢) only 4 : Which of the following statements concerning glucose is incorrect? a) ithas 4 asymmetric C-atoms b) itis an aldehyde ©) itis optically active 4) it isa disaccharide The standard compound for di tatement is/are etermination of 26. 27, 28. 29. 30. al. 32. 33. 34. 35. 2) Glycolaldehyde __b) Glyceraldehyde ©) Glucose d) Fructose In the ‘glycolipids’, the two sugars known to occur are glucose and sane a) Fructose + , _—_—) Lactose ) Galactose d) Sucrose Stachyose has formula, a) CygHyO yg b) Cyne ©) CyHyOn d) CogHy2O21 Which of the following is disaccharide? a) sucrose b) mannose ©) lactose ¢) cellobiose Potato pulp when heated with dil. H,SO, under pressure give a) sucrose b) glucose ) ‘glucose and fructose 4) glucose and sucrose ‘The change in optical rotation with time of freshly prepared solution of sugar is known as. a) Rotatory motion _b) Inversion ©) Specific rotation _d) Mutaroation ‘The number of sp? and sp* hybridised carbon atoms in glucose are respectively a) Sand1 b) Land 5 ©) 4and2 d) 2and4 Which one of the following is the reagent used to identify glucose ? a) Neutral ferric chloride b) Chloroform and alcoholic KOH ©) Ammoniacal silver nitrate d) Sodium ethioxide Which carbohydrate is used in silver mirror test ? a) sucrose b) galactose ©) cellulose 4) starch Homopolysaccharides on hydrolysis gives a a) single monosaccharide ‘ b) mixture of monosaccharide c) single disaccharide 4d) mixture of mono and disaccharides Heteropolysaccharides on hydrolysis gives a) a mixture of glucose and fructose b) a mixture of glucose and sucrose ©) amixture of different kinds of monosaccharides 4) only one kind of monosaccharide Amongst the following the sweetest sugar is a) fructose b) glucose ©) sucrose @) maltose SSS Havss ss! ‘Configuration in the ‘sugar chemistry’ is37, 38. 39, 40. 46 ‘The open-chain glucose and fructose have .«. and a) glycerol ) sorbitol so» chiral carbons respectively «) glycol 4) o-hexane | a) 44 b) 43 47, Reaction of bromine water with glucose suggest c) 33 d) 3,4 tha Cellulose is linear polymer of fa) 1 alcoholic group present in glucose a) a-(D) glucose b) B-(D) glucose b) 2° alcoholic group present in glucose BAD) gruclose. ——d) amylose ©) aldehyde group present in glucose The disaccharide, made up of two units of the 4d) cyclic structure of glucose same monosaccharide 48. Oxidation of glucose by conc. HNO, gives a): suerose b) laevulose glue d. This reaction suggest that the ¢} maltose ) lactose presence of The two form of glucopyranose obtained from a) aldehyde group Diglucose are known as b) 1° alcoholic group a) epimers a ©) 2" alcoholic group b) anomers ” d) ketone group ¢) enantiomers 49. Maltose is made up of 4) geometvical isomers 8) aD: glucose Glucose is a b) D-fructose a) aldohexose having three asymmetric «)_a-D-glucose and b-D-glucose carbon atoms d)_ glucose and fructose b) aldoketose having four asymmetric | 50. D-glucose and D-galactose differ in configuration at carbon atoms a) Cl b) C2 ©) aldohexose having four asymmetric «) C2 a C4 carbon atoms 51. How many pairs of D and L isomers possible for 4) aldoketose having three asymmetric aldopentose carbon atoms a) 2 b)3 ; During osazone formation from glucose, the o4 as : number of carbon atoms 52, Fructose form hemiketal between >C=O group and — a) increases by one b) increases by two OH group of a ¢) decreases by two d) decreases by one a) C3 b) C4 Fehling’s solution when heated with glucose gives ) C5 @) C6 a precipitate whose colour is 53. ce(D) (-) fructose and B-(D)(-) fructose are a) white b) black a) anomers b) epimers c} red ) yellow d) tautomers Glucose forms pentacetyl glucose which indicates | 54, Cyclic structure of fructose resembles with the presence of a) pyran b) furan 4 a) five primary alcoholic groups <). pyridine @) oxiran eee b) five secondary alcoholic groups 55. Sucrose contain a ©) five -OH groups a) 1-2a-B- acetal bond 4) five aldehydic groups 3 In which of the following oxo group is present | 56. a) glucose b) xylose a) ©) starch 4) fructose glucopyranose When glucose is treated with bromine water the b) C-1 of one glucopyranose and C2 product formed is sglucopyranose a) glucaric acid b) gluconic acid ° i ) lactic acid 4) sacchari acid When glucose is reduced by Na-Hg/H,O @ is formed slicopyranose 5.26- “Vtaltose contain ; a2. 3. 64 65, 66 carbohydrates is an essential constituents of plant cells s) 24aacetalbond 6) I-2-a-acetal bond a) Cellulose b) Sucrose {) papacctalbond — d) 1-te-acetal bond ©) Vitamins 4d) Starch {Glucose is said to have ~CHO group. Which of | 69. Which of the following statements is correct the following reaction is noi expected with glucose a) Cellulose are linear polymers of f-glucose molecules 4) itdoes not form oxime with B-14linkages p) it does not react with RMgX reagent b) Starch are polymers of a-glucose molecules with «) it does not reduce Tollen’s reagent o-l, 4elinkages and some (i-1, 6-cross linkages d) it does not form osazone ¢) Proteins are polyamides of B-amino acids Cellobiose is obtained by 4) ‘The structural information about their biosynthesis 3) complete hydrolysis of cellulose is contained in a class of compounds called nucleic b)_ partial hydrolysis of cellulose acids e.g. RNA and DNA ) complete hydrolysis of glycogen 70. In Polysaccharides the linkage connecting | 4) partial hydrolysis of reffinose monosaccharide units is called a) glycoside linkage _b) nucleoside linkage Cellobiose on hydrolysis produces ©) slycogen linkage —_d) peptide linkage 3 cp aiens by a-Difmaose 71. The beta and alpha glucose have different specific spb de @ pDiudes rotations. When either is dissolved in water, their aie : rotation changes until the same fixed value results. This Cellobiose contain ae 1 oe a) epimerisation b) racemisation b) CLC glycosidic bond “ ve i ¢) anomerisation 4) mutarotation oe 72. Inthe following structure 4) C-3-C-4 glycosidic bond . Starch on hydrolysis produces noch, a) a-D-glucose b) PD-glucose on ©) aD-fructose 4) D-fructose fou N, Amylopectin is 2" anomeric carbon is uo} a) liner polymer of a-D-glucopyranoye a b)_ branched polymer of a-D-glicopyranose ¢) liner polymer of f-D-ghtcopyranose a 2 4)_ branched polymer of a-D-glucopyranose g3 a4 Inamylopectin glycosidic branching present inbetween | 73, - Which is false about carbohydrates a) 1-4a-D- glucopyranose a) glucose is a disaccharide b) 1-4 §-D- glucopyranose b) starch ina polysaccharide ¢) 1-6a-D- glucopyranose ¢) glucose and fructose are not anomers, d) 1-6 B-D- ghcopyranose d) invert sugar consists of glucose and fructose Amylose contain 74. Glucose does not react with 3) Cl + C-t B-D- glycosidic bond 3) Br/HO b) H,NOH b) C-l-» C-4 @D- glycosidic bond ©) Hland red P 4) Naso, ©) C1 C6 P-D- glycosidic bond 75. The secondary structure of protein refers to 4) C1 + C-4 B-D- glycosidic bond a) a-helical backbone Cellulose is polymer of b) hydrophobic interactions a) a-D- glucose b) B-D- glucose ¢) “sequence of a-amino acids ©) eeD- fructose 4) maltose 4). fixed configuration of the polypeptide backbone The two forms of D-glucopyranese obtained from the | 76, The letter ‘1D’ is carbohydrates represents solution of D-glucose are called a) Tis direct synthesis. b) Itsdextrorotation 3) isomer b) anomer ©) Ismutarotation ——_d) Its configuration met @) enantiomer 77. Which of the following not true about erythrose? sistance that forms the plant cell wallsis or Which Orta cin Ga tan ion80, 81. 82. 89. SE The number of -OH groups p b) it contains aldehyde group 90. 6) it contains ketone group molecule can be estimated by €) itis called aldotetrose a) oxidation b) acylation ‘The number of atomsinthe cyclic structure of D-fructose ©) reduction | is 91. Sucrose is a5 b 6 4) homo polysaccharide of glucose ) 4 a7 b) hetero disaccharide of glucose and Galactose is converted into glucose in lactose a) Mouth b) Stomach «) homo disecharide of glucose ) Liver @) Intestine @) heterodisaccharide of glucose and Which molecule posses the general formula of fructose carbohydrates but is not a carbohydrate a) glyceraldehyde ——_—b) arabinose Parone ) lactic acid 4d) xylose, On heating sleose va Fehling’s solution we get ® | 99 Which amino acid has aromatic ring Fea crceae » es a) alamine b) glycine oEpeS a) white 93. ei ee in contains a eee the followi Inigestible carbohydrate, which i also a constituent of, eter acre See aes prosthetic group? 4) cellulose ee a) nucleic acid b) phosphate group callow mck ©) carbohydrate <¢) lipids Cellulore i linear polymer of 94, In the plant and animal kingdom proteins play a a) ceglucose b) Beglucose oa i ) efructose d) B-fructose i ae ena Milk changes after digestion into )_ in building of new cells a) cellulose b) fructose ¢) asa store of energy ) glucose ) lactose @) both ‘a’ and 'b' fe 95. Point out wrong statement about proteins sean 1) enomers a) these are polymeric macromolecules ) epimers d) tautomers b) they are present in food stuff ‘Many of the the carbohydrates are sweetin taste because ) many of them are hormones & enzymes of 4) they do not contain COOH group a) they give sugars on hydrolysis 96. Which of the following is a fibrous protein? b) covalent bonding a) haemoglobin b) keratin ¢). elcectrovalent bonding : ©) albumin 4) enzymes 4) co-ordinate bonding 97. Polymers of more than 10000 amino acids are ‘Number of chiral carbon in BD (+) glucose is termed as , a) three epti 5 five : ne 4) peptides b) decapeptides Starch, cellulose, insulin odds trina a ee 4) polyamino peptides ee , and dextrin are examples | 98. Which of the following consist of only essenti a) monosaccharides b) oligosaccharides eee polysaccharides d) disncchari a) slycine, serine, proline Which type of isomerism is ex b)_ valine, glycine, lucine compounds obtained on hydrolysis of sucrose ? ©) serine, Tryptophan, proline 8). optical isomers 4) valine, lucine, tryptophan b) position isomers 99. Prosthetic group in } ‘i ©) chain isomers ) ph group in haemoglobin is of, a) ph enna d) functional group isomers a Phosphoric acid —_b) any metal iron a) glucose = zed100. 101. 02. 03, 04. 05. 06. 07. 108. log, no, Mm. Keratin present in hair is, 2) Amino acid residues join together to make a protein fa) simple protein molecule b) conjugated protein b) Proteins are polymers with formula (C,H,,0,),, ©) derived protein ©) Eggs are rich in protein d) lipoprotein d) Pulses are good source of proteins ‘Tyrosin is present in which of the following protein | 113. Chromoproteins contains a prosthetic group ? a) chromium b) carbohydrate a) myocin in muscles c) phosphoric acid d) coloured pigments b) keratin in wool . 114. Which of the following is responsible for heredity ¢) mucin in saliva character ¢) fibrion in silk a) DNA b) RNA Polymer of o-amino acid is, c) Proteins d) Hormones a) acetamide b) ammonia. 115. Which one of the following food stuff contains ¢) protein d) fatty acid nitrogen? Casein of milk is an example of a) fats b) carbohydrates a) chromoprotein b) nucleoprotein c) proteins d) oils ©) phosphoprotein) glycoprotein 116. Which of the following scientist proved that in Enzymes belong to, proteins the amino acid’s are linked together a) synthetic polymers b) polysaccharides through peptide linkages ¢) polypeptides a) polyesters a) Emil Fischer b) Kekule The proteins which maintains blood sugar level in the c) Mulder @) Hoffmann human body 117. The molecular weight of protein is a) Haemoglobin b) Oxytocin a) 10,000 ¢) Insulin d) Ptyalin 'b) 1000 to 10,000 Starting with two different amino acid molecules, ¢) greater than 10, 000 how many dipeptide molecules are formed ? a) below 1000 a). b) 2 118. Which of the following statements is not true? 3 aa a) peptides give camino acids on hydrolysis Which one of the following statements is correct b) peptides are not c-amino acids a) All amino acids except lysine are optically active c) peptides have amide linkage b) All amino acids are optically active 4) two peptides can form two differ ©) Allamino acids except glycine are optically active amino acids 4) Allamino acidsexceptglutamicacidsareopticallyactive | 119. Proteins and Biuret reagent give, ‘The bond that determines the secondary structure of a) green colouration proteins is or secondary structure of protein is due to b) yellow colouration a) Coordinatebond —_b) Covalent bond ©) red, green colouration ¢) Hydrogen bond d) Peptide bond @) red, violet colouration Which of the following is derived protein? 120. Biuret testis given by proteins due to the presence a) histone b) haemoglobin of ¢) insulin d) peptones a) -S-S linkage b) -NHCO: linkage ‘The elements present in protein are ©) -SH linkage 4) -NFy group a) C,HandN only — b) C, O and N only 121, Which of the following contains the highest s) CandHonly —_ d) C,H, O and N percentage of protein Egg albumin is an example of a) globular protein a) groundnut b) gow’s milk b) fibrous protein c) egg d) wheat ¢) derived protein 122, Which one of the following is the general @) conjugated protein structural formula of an amino acid? Which of the following statements about proteins is not a) RCH,NH, b) RCH(COOH)NH, true ©) RCH,CONH, ~ 4) RCH(NH,JOH 5.29)127, 128. 138, The (est used for identifying peptide Tinkage in proteins is a) Lucas test cc) Biuret test 1b) Borsche's test €) Molisch's test Millon’s test is used to dete 2) phenolic -OH group in proteins b) acids ¢) aldehydes Proteins give a brick red precipitate with Millon’s reagent which is? a) mercurous and mercuric nitrate in HNO, and mercuric chloride in HCI ©) mercurous and mercuric chloride in HNOs @) CuSO, and 10 sy NaOH Which of the following is not essential amino acid a) valine b) lysine ©) histidine d) glycine The proteins are hydrolysed with acids, alkalies or enzythes finally to, a) ethers b) _cycloparaffins ©) esters, d) amino acids Which of the following molecules is capable of forming Zwitter ion? a) NH,CH,COOH ©) CHyCH,COOH b) merew b) CHyCH,NH, 4) CH,CONH, Which among the following is peptide linkage? 3) -G-N- ») -¢-0-N- on ko ©) -C=NH a) -N=C-0- R R Proteins when heated with conc. HNO, give a yellow colour. This is, a) Onidizing test b) Xanthoproteic test ©) Hoppe’s test @) Acid-ba Which of th a) Lysine e test amino acid following is an neu b) Arginine @) Histidine In the primary structure of proteins, the amino acids are linked by a) hydrogen bonds b) peptide bonds ©) Van der Waal’s forces @) ionic bonds The correct’ order of C,H, N and O in protein is ) Cystsin percentage of Ind. 136, 138. 140, M1. 7 GSO0SNS>H_ 0b) N>C>O>H 0) C>N>O0>H A) C>H>O>N In the. helical structure of proteins, the protein chains are held in position by : a) peptide bonds b) covalent bonds ©) hydrogen bonds ad) Van der Waal’s forces mino acids behaves as a) acidic only b)_ basic only 6) netitral 4d) acidic or basic depending on pH Leucine amino acids is the a) Essential b) Non-essential <) Aromatic a) Basic ‘The number of essential amino acids in man is a) 8 b) 10 °) 18 @) Glycerides are, a) esters of fatty acids and glycol b) esters of fatty acids and glucose ©) esters of fatty acids and glyterol 4) esters of fatty acids and sorbitol Which one of the following is most unsaturated fatty acid ? 4 a) oleic acid ¥ b) linolic acid ©) linolenic acid @) myristic acid Fats and oils are formed from respectively, a) glycerol and long chain unsaturated acids only 4 b) glycerol and long chain saturated acid only 3 } glycerol and long chain saturate acids and unsaturated acids d) ethylene glycol and long unsaturated and saturated acids ‘The waxes are long chain compounds of fatty. ack which belongs to the class of i b) Ethers: a) Acetic acid chai a) ©) Alcohols Fat consists of a) Monohydroxy carboxylic acid b)_ Monohydroxy aliphatic carbo»: lie acid123, 124 125. 126, 127. 128, 134 GE b) N>C>O>H ‘The test used for identifying peptide linkage in a) C>O>N>H proteins is «) C>N>O>H @d) C>H>O>N a) Lucas test b) Borsche’s test lad. In the helical structure of proteins, the protein ©) Biuret test ¢) Moliseh’s chains are held in position by Millon's test is used to detect, a) peptide bonds a) phenolic -OH group in proteins b) covalent bonds b) acids ©) hydrogen bonds ¢) aldehydes 4) Van der Waals for 4) amines 135. o-amino acids behave: Proteins give a brick red precipitate with Millon’s a) acidic only reagent which is? b) basic only a) mercurous and mercuric nitrate in HNOy ©) neutral b) mercurous and mercuric chloride in HCl d) acidic or basie depending on pH ©) mercurous and mercuric chloride in HNOy Leucine amino acids is the 4) CuSO, and 10% NaOH a) Essential b) Non-essential Which of the following is not essential amino acid 6) Aromatic 4d) Basie a) valine b) lysine 137, The number of essential amino acidsin man is ) histidine 4) glycine a) 8 b) 10 ‘The proteins are hydrolysed with acids, alkalies 8 a) or enzytfes finally to, a) ethers b) _eycloparaffins c) esters 4d) amino acids Which of the following molecules is capable of forming Zwvitter ion? ee a) NH,CH,COOH — b) CH,CH,NH, a) esters of fatty acids and glycol ©) CHACH;COOH €) CHyCONH, b) esters of fatty acids and glucose Which among the following is peptide linkage? ey cects ol ny) acid ond elyeetol 4) esters of fatty acids and sorbitol yg ft b) -G-O-N- 139. Which one of the following is most unsaturated oO H fatty acid ? ©) -C=NH @) -N=C-0- a) oleic acid R k b) linolic acid 4 Proteins when heated with conc. HNO, give a linolenic aed yellow colour. This is, d) myristic acid a) Oxidizing test 140. Fats and oils are formed from respectively, _ b) Xanthoproteic test a) glycerol and long chain unsaturated c) Hoppe's test acids only : d) Acid-base test b) glycerol and long chain saturated acids Which of the following is an neutral amino acid only a) Lysine b) Arginine ©) glycerol and long chain saturated Fe) Cystsin a) Histidine acids and unsaturated acids } . In. the primary structure of proteins, the amino @) ethylene glycol and long hai acids are linked by unsaturated and saturated acids 3 a) hydrogen bonds 141. ‘The waxes are long chain compounds of fatty. a b) peptide bonds whieh belongs to the class of ¢) Van der Waal's forces a) Esters b) Ethers 4) ionic bonds ©) Aleohols 4) Acetic acid he Weirect order of percentage or | 42 - Fat consiswof DENG Osspoinn Pree ot 2} Monohydroxy carboxylic acie b) Monohydroxy aliphatic carbos: ite acid 530J Monohydroxy aliphatic, saturated earboxylieacid a) paraffin ofl b) linseed oil 4) Dihydroxyl aliphatic carboxylic acid ©) coconut oil d) groundnut oil Vegetable oils are, 152. Which one of the following is saturated acid ? 4) glycerides of unsaturated ito b) linolic acid b) plycerides c ed fatty acids ©) stearic acid «) Kinolenii ¢) sodium salts of higher fatty acids 153. Name the following triglyceride d)_ mixture of sodium and potassium salts of lower acids ° Lia. From the following identify the correct statement, cH-0-C-C,,H,, a) oils and fats have all chemical properties 9 identical én-0-l-c,,H, b)_ saponification of only fat can take place ° ¢) oils and fats may be of vegetable or animal CH-o-€-c,H,, : origin : i 4) oils can be converted into fats and vice versa oe by hydrogenation Sem ae : 145. Phospholipids are esters of glycerol with pie oleg palmlto-ecana ee eee 3 palnko-stenrate b) three carboxylic acid residues eee i €) Too carboxylic acid residues and one phosphate | 154+ The waxes are long chain compounds of fatty acids which belong groups El 4) one carboxylic acid residues and one phosphate a) “Eaters Bee pens ) Alcohols ) Acetic acid 146. Washing sap can be prepared by sponicaon wit | 195: Hyerolytte reaction of fats with caustic soda is alkali and Reed Sener heal a) acetylation b) carboxylation aE henner ©) saponification _) esterification 1a Ona pam othe 156. Vanaspati ghee is prepared by which of the : 2 following reactions of vegetable oils ? a) Sameamountofenergy as one gram of carbohydrate oe ia : b) Same amount of ener gram of protei este See acer ) recreate ae ©) distillation @) dehydrogenation c) More thantwice the energy as one gram of : carbohydrate or protein bee eee eons 4). essenegy tanone gram of carbohydrate or pa 8} a mixture of calcium and sodium salts of 148, What happens when highly unsaturated oils are a eater Ta ae aa can Bik exposed to light and moist air ? = pee sar acids a) rancidification __b) isomerisation 7 ce i aime ©) a mixture of potassium stearate and glycerol ©) fermentation 4) polymerisation 4) a mixture of sodium salts of higher fa tt y 149, Animal fats are glycerides of acids a) fatty acids 158. The number of milligrams of KOH required to b) saturated fatty acids neutralize 1g of the oil or fat is called, ©) saturated alip! a) acid value b) acetyl value 4) saturated alip| ‘boxylic acids ¢) saponification value d) iodine value Which of the following statements are not true IBD. = Hard’soapeiers; 8) Fats and oils are stored source of energy 1), calcium salts of higher fatty acids b) They provide more energy than proteins or b) sodium salts of higher fatty acids carbohydrates ¢) pate ©) They help in absorbing the vitamins A and D magn 4). Fats are soluble in water 160, ‘Triste 151. Which one of the following is not an oil? mainly gives, ne Fai Eieay161. 162. 163. 164. 166. 167. 168. 170. a) methanol 171. Innucleic acids, the sequence is b) propane-1,2,3-triol a) Base-phosphate-sugar ©) ethanol b) Phosphate-base-sugar @) propanol ¢) Sugar-base-phosphate Vanaspati ghee is manufactured by, 4) Base-sugar-phosphate a) oxidation of oil ‘ 172. The segment of DNA which acts as the instructional b) dehydrogenation of oil manual for the synthesis of the protein is ¢) hydrogenation of oil a) Nucleoside b) Nucleotide d) hydrolysis of oil ©) Ribose d) Gene Rancidity of butter is due to the formation of 173. Antibodies are a) butene-1 b) butanoic acid a) Carbohydrate ©) lactose d) lactic acid b) Globular protein In contact with air and moisture, oils and fats ©) Immunoglobulins develop unpleasant odour and bad taste. This d) Cellulose compounds process is called 174, Asequence of how many nucleotide in messange RNA a) hydrogenation _b)_ hydrolysis makes a codon for an amino acid c) degradation ) rancidification a) One b) Two Laundry soap is obtained by saponification of ¢) Three 4) Four a) groundnut oi b) paraffin oil 175, Enzymes are made up of c)_ kerosene oil d) rose oil a) Carbohydrates During hydrogenation of oils to get vegetable b) Edible proteins ghee, which one of the following takes place c) Nitrogen containing carbohydrates a) hydrogen removes impurities from oil 4) Proteins with specific structure. b) hydrogen dissolves in oil 176. Which of the following is not present in nucleic acid ¢) unsaturated hydrocarbon part is saturated a) Uracil b) 2-aminopyridine 4) addition of water c) Thymine d) Adenine The weight of NaOH required to completely | 177 Pancreatic juice contains the enzyme saponify one mole of a fat is a) zymase b) invertase a) 40g b) 80g <) diastase ) lipase a o) 120g 4) 20g 178. Which amino acid has aromaticring The weight of H, needed for complete saturation a) alamine b) glycine of 2 moles of triolein is a sal z b) Gems °) tyrosine d) lysine 7 : ta " a 179.’ Identify the correct statement regarding enzyme : 2 mole of an oil on complete saponification giv a) os sian biological catalyst that cannot 'x' mole of glycerol and 'y’ mole of soap, then ' dal acsaains seh dee’ weet b) enzyme are normally heterogenus. catalyst that are @) Land 3 b) Sand 1 very specific in their action p ©) Gand2 a) 2andG <) enzyme are specific biological catalyst that can _| ‘The number of asymmetric carbon atom(s) present normally function at very high oe 4 in glycerol is / are (T - 100 K) a) 0 b) 1 d) enzyme are specific biological catalyst that posses | 03 a3 well defined active site 180. RNA is different from DNA because RNA contains a) ribose sugar and thymine b) ribose sugar and uracil Enzymes belong to which class of compounds ©) deoxyribose sugar and thymine a) Polysaccharides 4) deoxyrobose sugar and uracil b) Polypeptides 181. The enzyme which hydrolyse sugar is ¢) Polynitrogen heterocyclic compounds a) sucrase 'b) maltose d) Hydrocarbons ©) glucase 4) invertase 532195, os The fist harmone chemically synthesised inlaboratory is b) 4 pyrimidine bases a) cortisone b) thyrotropin ) 2 purine bases and 3 pyrimidine bases ) adrenaline 4) estrone d) 4 pyrimidine bases and one purine base ‘The base present in DNA but notin RNA is 196. ‘The purine base present in RNA is a) guanine b) adenine a) guanine b) thymine ) Uracil 4) thymine <) cytosine @) uracil ‘The double helical structure of DNA was proposed by | 192 Which of the following is not present in nucleotide? a) Watson and Crick —b) Meicher a) guanine b) cytosine Emil Fischer @) Khorana ) adenine 4) thryoxine Which of the following is responsible for heredity charater | 198. DNA has deoxyribose, base and the third compound is a) DNA b) RNA a) phosphoricacid ——_b) ribose <) Proteins @) Harmones ©) adenine 4) thymine ‘The base present only in RNA and not in DNA 199. Which of the following base is linked, as one strand of 3) uracil b) cytosine DNA to cytosine of the other strand by hydrogen bonds? ©) thymine @) guanine a) guanine b) adenine Enzyme trypsin converts: 6) thymine @) uracil a) amino acids into proteins b) glucose into glycogens ¢) starch into sugar 4) proteins into amino acids 200. Which of the following is not true about vitamins Which enzyme hydrolysis triglyceride to fatty acids and a) they are vital for life glycerol? b) they help in digestion a) Amylase b) Maltase ©) they were named by "Funic” <) Lipase @) Papsin 4d) their deficiency causes diseases ‘The enzyme that hydrolyses casein of milk into par | 201. Vitamin B,, contains metal casein is: a) Ca (1) b) Zn (I) a) renoline b) rennin co) Fe(tl) 4) Co (Il). ) replication @) renil 202 Which of the following is not a sex hormone ‘The enzyme present in saliva is: a) testosterone b) adrenaline ®) pepsin b) peptidase ©) estradiol 4) cortisone ) lipase €) plyalin 203. Which is fat soluble vitamin Pancreatic juice contains the enzyme: 3) vitamin A ») pyridoxin 2) aymase i) invertase ©) riboflavin 4) thiamine 5 gas €) lipase 204. Which of the following is a vitamin Deoxyribonucleic acid (DNA) consists of the following a) riboflavin b) thyroxine ise ©) adrenaline ¢) guanine ah peptides b) glucosides 205. Which of the following hormones helps in the i ceaate @) deoxyribose conversion of glucose into glycogen inthe body ‘The structure of RNA molecule consists of Ceo ) cortisone a) double helix b) single helix ©) thyroxin ) oxytocin ©) single strand d) branched chain 206. The hormone thyroxine Nucleic acids are: i) macerated by pancreas 8) polymers of nucleotides b) is secreted by thyroid b) polymers of nucleosides 4 ee ee od polymers of purine bases through phosphate ester | . ee ~ @) phoshate ester bonds ty ee Nucleic acids contain: Uciee ees @) 4 purine bases Saber ee )_nucleic acid cay apBs The fist harmone chemically synthesised inlaboratory is b) 4 pyrimidine bases a) cortisone b) thyrotropin ) 2 purine bases and 3 pyrimidine bases adrenaline 4) estrone 4) 4 pyrimidine bases and one purine base The base present in DNA but not in RNA is 196. The purine base present in RNA is 4) guanine b) adenis 2) guanine b) thymine ) Unail 4) thymine ©) cytosine ¢) uracil ‘The double helical structure of DNA was proposed by | 197 Which of the following is not present in nucleotide? a) Watson and Crick —_b) Meicher a) guanine b) cytosine ¢). Emil Fischer 4) Khorana <) adenine @) thryoxine Which of the following is responsible for heredity charater | 198. DNA has deoxyribose, base and the third compound is a) DNA b) RNA 8) phosphoricacid ——_b) ribose ¢) Proteins d) Harmones ¢) adenine ) thymine ‘The base present only in RNA and not in DNA 199. Which of the following base is linked, as one strand of 2) uracil ) cytosine DNA to cytosine of the other strand by hydrogen bonds? ¢) thymine d) guanine a) guanine b) adenine Enzyme trypsin converts: oni eae a) amino acids into proteins b) glucose into glycogens ¢) starch into sugar 4) proteins into amino acids 200. Which of the following is not true about vitamins Which enzyme hydrolysis triglyceride to fatty acids and a) they are vital for life glycerol? b) they help in digestion a) Amylase b) Maltase c) they were named by "Funic” ©) Lipase 4) Papsin 4) their deficiency causes diseases The enzyme that hydrolyses casein of milk into par | 201. Vitamin B,, contains metal casein is: a) Ca) b) Zn (1) a) renoline b) rennin co) Fe() 4) Co (III) <)_ replication ¢) renil 202 Which of the following is not a sex hormone The enzyme present in saliva is: a) testosterone ») adrenaline a) pepsin b) peptidase ©) estradiol 4) cortisone ) lipase 4) ptyalin 203. Which is fat soluble vitamin Pancreatic juice contains the enzyme: a) vitamin A b) pyridoxin ae anaes ») invertase ¢) riboflavin 4) thiamine diastase €) lipase 204, Which of the following is a vitamin Deoxyribonucleic acid (DNA) consists of the following a) riboflavin b) thyroxine units: ©) adrenaline ¢) guanine 2) peptides b) glucosides 205. Which of the following hormones helps in the oy) aan €) deoxyribose conversion of glucose into glycogen in the body The structure of RNA molecule consists of: a) insulin, b) cortisone a) double helix b) single helix ¢) thyroxin 4d) oxytocin ©) single strand d) branched chain 206, The hormone thyroxine Nucleic acids are: a) issecreted by pancreas a) polymers of nucleotides b) is secreted by thyroid b) polymers of nucleosides ©) decreases blood sugar ) polymers of purine bases through phosphate ester 4) does not stimulate metabolism bond 207 Hormones function as: 4) phoshate ester bonds ) chemical messengers Nucleic acids contain: b) coenzymes 8) 4 purine bases ©) provitamins )_nucleic acid SS: =I 208. The organic compounds of high physiological a) riboflavin ») vitamin B, | importance which are essential in small amounts for ©) vitamin A «) vitamin B, | the well being of all human beings are: 223. ‘The hormone which maintains blood sugar level is; 8) proteins b) vitamins a) oxytocin b) haemoglobin 4) mineral salts ad) enzymes ©) insulin 4) pryalin 209. Vitamin A is also known as: 224, Vitamin D is also known as: a) xerophythol ) thiamine a) growth vitamin ) riboflavin @) pyrionin b) ascorbic acid 210. Citrus fruit are an important source of vi : ©) reproductive vitamin B bc @)_ sunshine vitarnin oD aK Which of the following vitamins is present in cod-iver 211. Which one of the following compounds is not vitamin? 2 a) Ascorbic acid b) Thiamine a) A ») B,, c) Testosterone 4) Riboflavin 3B ac 212. Which vitamin contains nitrogen ? 226, Which of the following is protein hormones? 3) Vitamin A b) Vitamin C 4) inslulin b) oxytocin ) Vitamin B «) Vitamin D ©) both (a) and (b) 4) ribose 213. Vitamin which is believed to cure common cold is: | 927 Insulin, a protein acts as: al A Cc a) anantibody 4) ahormone jK aE ) anenzyme €) atransport agent 2M. Deficieney of vitamin E causes: ©) beri-beri 4) scurvy = 215. Vitamin A is present in: 228. Fats are the triesters of glycerol with a) liver b) milk a) aliphatic monocarboxylic acid ©) greenvegetables —_d) all of these b) saturated monocarboxylic acid 216. Which of the following contains vitamin D? aliphatic, saturated monocarboxylic acid a ced ete 4) aliphatic, unsaturated monocarboxylic ©) Tocopherol 4) None of these acid 217 The best source of vitamin A is 229. The number of essential amino acids in man is a) bens b) wheat Ae b) 20 ©) carats 4) oranges Gre 10 218, Thedlsease betes mein scasedbythedecleney | 935 The most abun dant orginie conssimeter pant are a) iodine b)_ insulin a) alcohols b) carbohydrates c) phenyl alanine hydroxylase _, ¢) Proteins a) fats > A ee 231. Aldotetroses consist of two chiral carbon atom 219. ‘The hormone used as an oral contaceptive is: and they exist in, aj aldosterone b) cortisone 3) 2 optically active forms ¢) progesterone d) testosterone b) 8 optically active forms 220, The hormone insulin isa secretion of the organ ©) 4 optically active forn a) ovary 1) testes 4) 6 optically active forms ©) adrenal cortex 4) pancreas Magnesium is present in, 221, Which is nota member of viomin B eumplex group? 8) casein b) keratin a) retinol b) thiamine ©) haemoglobin @) chlorophyll f o) sibollavin 4) pyridoxine Iron is a constituent of, ‘ 222. Which one of the following vitamins contains a metal 4) haemoglobin b) chlorophyll atom? © hormones Se @) proteins 54I 254, 258. 256. 259, ee ©) proteins are polyamides of f-amino acids 260, Of the following statements about enzymes which one | 4) glucose and galactose are epimers oretrue : 7 i i) Enzymes lack in nucleophilic group Which of the following is the stucture of D-xylose i ao igh spesebath in nding i | substrates and in catalyzing their reactions i yr iii) Enzymes catalyse chemical reactions by lowering | Ho: H Ho: H the activation energy | a) H——on >) HO—}— iv) Papsin is a proteolytic enzyme H ‘OH " ‘OH 2) b) (i) and (i) CH,OH CH,OH c) (i), (ii) and (iv) ¢ (i) 261, In nucleic acids, the sequence is 8) Base-phosphate-sugar rae cHo b) Phosphate-base -sugar ) Sugar-base- phosphate H—)-— 0H ieee ) Base-sugar-phosphate ©) HO—7—H_ ed) HOH 262. Insulin production & its action in human body are 4 OH iH “ responsible for the level of diabetes. This compound CH,OH CH,OH belong to which of the following catagories a) Anenzyme b) Ahormones The two forms of D-glucopyranose obtained from the <) Aco-enzyme d) An antibiotic solution D-glucose are called 263. A nucleotide on hydrolysis gives a) Isomer b) Anomer a) Heterocyclic base & orthophosphoric acid ©) Epimer 4) Enantiomer b) Analdopentose, a heterocyclic base & Secondary structure of a protein refers to corthophosphoric acid a) Mainly denatured proteins and structure of ©) Analdopentose & heterocyclic base prosthetic groups 4) Analdopentose & orthophosphoric acid b) Three dimensional structure, specially the bond | 264. ‘The bond that determines the secondary structure of between amono acid residues that are distant from proteinsis OR each other in the polypeptide chain Secondary structure of protein is due to ¢) Linear sequence of amino residues inthe polypeptide @) Coordinatebond —_) Covalent bond chain ©) Hydrogenbond ——_d) Peptide bond 4) Regular folding paterns of continuous portions of | 265. Which of the following statements about proteins isnat the polypeptide chain true Mutation of DNA occurs due to changesiin the sequence a) Amino acid resdues join together to make protein of one of the follwing a a) Bases b) Ribose units b) Proteins are polymers with formula (C,H,,0,), ©) Phosphate units d) Sugar units ©) Eggs are rich in protein : ‘The function of DNA is 4) Pulses are good source of proteins 7 ae Eine — vein 266. Which part of the protein molecule is responsible ioe ot ee renecrraneratdn ea function and activity of the protteins alate y charactersties from generation a) Secondary structure All ate correct petite ¢) Primary structure saa eter beiree DNA and RNA js 4) Binding sites Z a eee shove and aan pag, | 20% Beste llowsing statements cael eer ana 4 A) Albumin is a simple protein 2 ¢) Presence ofribose and thymineis DNA, deoxyribose a i Ne mind acid alanine contsing an acidic i and uracil in RNA insulin is a hormone = 4). Presence of deoxyribose in DNA and ribose RNA 1D) Muscles contain the protein keratin ‘ ‘ sa @274, 5. 276. 7. Point out the wrong statements in the above set of stements a) AB od AC A awitter ion is a) A positively charged ion without a metal atom in it b) A negative charged ion without a metal atom in it c) An ion with positive and negative charges of different points on it 4) Aheavy ion with a small charge on it Which ofthe following vitamins contains isoprene unit? a) A bc ) B, QD Which of the following elements are necessary for maintaining fluid balance in the body? a) Calcium and magnesium d) B,D b) Potassium and sodium 281. ©) Tron and magnesium d) None ofthe above Which of the following is not a pyrimidine base? a) Thymine b) Guanine ©) Cytosine 4) Uracil Antibodies are: a) carbohydrates b) proteins )_ phospholipids 4) lipids Redness of blood is because of the presence of a) iron is haeme pigment b) haemoglobin c) copper in haeme pigment 4) Znin heamoglobin ‘A chemical substance acts as the currency of energy metabolism in a cell. It is: a) adenosine triphosphate b) adenosine diphosphate ) adenosine monophosphate 4) glucose ‘The antibodies necessary to protect new born babies from infection are derived from: a) cow's milk ) mother's mil 4d) honey Rice has deficiency of the essential amino acid: a) alanine o) lysine d) leucine Increased blood pressure may be caused by excess -cretion of: a) thyroxine ©). estradiol d) adrenaline Which of the following hormones conta 8) Adrenalin b) ‘Testosterone ©) Thyroxine ) Insulin ‘The a - and f- glucose have different specific rotation. When either is dissolved in water their rotation changes until the some fixed value. This is called b) C.D 280. ») pasteurised milk 282. b) glycine 283. b) testosterone 284. a) epimerisation ) anomerisation ©) racemization 4) mutarotation Which of the following is D-erytrulose? cH, -On CH, -OH | bso be0 4 b | a) HO-C-H b) H-C-H | - | CH, -OH CH, -OH cHo cKO I H-C-OH HO-C-OH I 1 ¢) H-C-on 4) Hrt-on I CH, -OH CH, -OH Which of the following is L-fructose? CH,OH H,-OH C0 ie Ho: H H OH ee OH 4) HO H H OH HO- H CH,OH CH,OH CH,-OH CH,-OH -0 co i OH” HO: H 9 HO Hee ae OH H ‘OH HO: H CH,OH CH,OH How many D-isomers are possible for aldohexose a) 4 b) 6 3) 8 4) 16 Glucose form hemiacetal between CHO group and ~ OH group on a) C2 ») C3 ) C4 a cs Anomer of glucose is a) sismembered five carbon atoms and one oxygen atom cyclic structure b) five membered five carbon atoms and one oxygen atom cyclic structure ¢) six membered six carbon atoms and one oxygen atom cyclic structure syTn darch moleaile a-D- glucose molecule consist of 4) fivemembered four carbon atomisand one oxygen | 292. atom eyclie structure fa) amylose and agar 285. In anomeric forms of fructose which carbon ato b) amylopectin and agar involved in ring formation ©) amylose and amylopectin Ser mdics b) CB and OS d)_ amylose and cellobiose a eiunGl a) Cl mds 293, In amylopectin glycosidic long chain and branching, aa 4 oceursin between 28 aD) (9) fatone and PDH) rons fers in pores despre far 2 x Deglucopycanose and branching at C-1 of one | oe : ace b) C-lofonea-Dglucopyranose > C-3 of another a 287, Suerose melecule is formed by monosaccharide of Deglucopyranose and branching at C-1 of one a) a-D- glucofaranose and §-D- fiictopyranose slucopyranose C-5 of another glucopyransoe b) a-D- glucopyranose and a-D- fructofuranose ¢) C-l of one B.-D-glucopyranose ~> C-4 of another <)_eeD- glicopyranose and f-D- fructofuranose Deglucopyranose and branching at C-1 of one B-D. @) a-D- glicopyranose and a-D- fructofuranose slucopyranose and C-5 of another glucopyransoe 288. In cyclic structure of cane sugar glycosidic bond is 4d) C2ofonea-D-glucopyranose -> C-4 of another aD: formed in between glucopyranose and branching at C-1 of one a-D- a) .C-1 of a-D-glucopyranose and ‘glucopyranose and C-6 ofanother «-D-glucopyransoe C5 of B-D- fructofuranose 294, In cyclie structure of cellulose glycosidic bond present b) C5 ofa-D-glucopyranose and in between C1 of B-D- fructofuranose a) C-lofone B-D-glucopyranose and ¢) Cl ofe-D-glucopyranose and C-4 of another f-D- glucopyranose C2 of B-D- fructofuranose b) C1 ofone f-D-glucopyranose and C-2ofaD-glucopyranose and C-4 of another f-L- giucopyranose C1 of P-D- fructofuranose ©) C-Lofone f-D-glucopyranose and 89. Lactose on hydrolysis produces C-4 of a-D- glucopyranose nIP-D glucose ond f-Dvaalactoce 4) C-lofone B-D-glucopyranose and bJa-D-glucose and a-D-galactose een a él & jo-D-glucose and B-D-galactose ot ae = oe iene a) C-l> C4 o-D- glucopyranose glycosidic bond h ))B-D-glucose and o-D-galactose He b) C-1+ C-5 a-D- glucopyranose glycosidic bond 290. Incyte structure of maltose glycosidic linkage present «) Cl C4 B-D- glucopyranose glycosidic bond ser! 4) C-1> C-4B-D- fructofuranose glycosidic bond a) C-1 of D-glucopyranose and 296. When three different B amino acids are condense C2 of B-D-galactopyranose together, how many different tripeptides are formed b) C-4 of B-D-glucopyranose and aie b) 6 C-1 of B-D-galactopyranose ?) 8 @) 10 ©) C-1 of B-D-glucopyranose and 297. The helical structure of protein is stabilized by C-4 of B-D-galactopyranose 2) dipeptide bond 4) C-4 of P-D-glucopyranose and b)_ glycosidic bond C-1 of B-D-galactopyranose ¢) intermolecular hydrogen bond between-NH and 291. In cyclic structure of cellobiose acetal bond is formed carbonyl oxygen between 4) Intermolecular hydrogen bond between-NH and a) C-Lofone f-D-glucopyranose and carbonyl oxygen 4 C2 of another )- ylucopyranose 298. Denaturation of protein b) C-1ofanother one f-D slucopyranose and 4) disrupts the 1° andl 2° steucture of proteins C4 of -D- glacopyranose b) disrupts the 2° and 3° structure of proteins ) Clofone B-D-glucopyranose and ©) disrupts the 1°, 2°, 3° structure of proteins C-4 of another -D- glucopyranose 4) is reversible process. d) C-lofone «-D-glucopyranose and 299. In e-pleated structure polypeptide chain is C-4 of another B-D- giucopyranose a) ochelix b) cchalix ©) aig-20g5 a) linear Ci 5.38 ¥ =< 45Which of the following has a-plated structure a) oxytocin b) mucin ° )_fibroin of silk. d) insulin Nu gol, Tertiary structure of protein is arises due to 9 HN oven a) folding of polypeptide chain Oo CH, b)_ folding, coiling and bonding of polypeptide chain «)_ Hinear sequence of amino acid in polypeptide chain oH f d)_ denatured proteins . it coon 302, The linkage between the two monosaccharide units in f ca, lactose is a) C, of f-D-glucose and C, of f-D-galactose 307, ae following statements carefully b) C, of B-D-galactose and C, of B-D-ghicose albumin is a simple protein: eer 6d) CofeD galactose and C.of ca B) the amino acid alanine contains an acidic side chain Sse ©) insulin is a hormone a 8 ind ©, of a-D-galactose D)- muscles contain the protein keratin 303. _ Which setoftermscorrectl identifies the carbohydrate shown Point out the wrong statements in the above set of statements H - i a) AB ») GD J Ac 4) B,D HOH,C\ oy n/™ 308. Amino acids usually exist in the form of Zwitter ions. This means that it consists of H OH a) the basic group -NH, and the acidic group -COOH ae De b) the basic group —NH; and the acidic group -COO- 3. Aldose 4. Kétone c) the basic group -COO-and the acidic group NH} 5. Pyranose 6. Furanose Ooh oa ea eae a) 1,3and6 b) 1,3and5 309. Which part of the protein molecule is responsible for ©) 2,3and5 d) 1,4and6 function, and activity of the proteins. 304. ‘The intermediate compound formed in the conversion a) secondary structure _b) peptide bond of starch to glucose is ©) primary structured) binding sites. a) lactose b) sucrose 310. The process by which synthesis of protein takes place ) maltose 4) fructose based on the genetic information present in m-RNA is 305. Denaturation of protein called a) disrupts the primary or secondary or tertiary a) translation ») transcription structure of protein ©) replication d) messenger hypothesis b) disrupts are secondary and tertiary structures only | 311, — Identify the correct statement regarding enzymes ©) disrupts all the primary, secondary and tertiary a) enzymesare specific biological catalysts that cannot . and even the quanternary structure of protein be poisoned. 4) will not affect the original biological activity b) enzymes are normally heterogeneous catalysts that 506, A tripeptide is writen as Glycine-Alanine-Glycine, The are very specific in their action, correct structure of the tripeptide is ¢) enzymes are specific biological catalysts that ean normally function at very high temperature (T CH, © cH, ~ 1000 K) et | : 4) enzymesare specific biological catalysts that posses a) HN’ i: | NH SNH COOH well-defined active sites ° 312. Phospholipids are esters of glycerol with a) three phosphate groups 7 b) three carboxylic acid residues ve a ae €) twocaboxylie cid residues and one phosphate group ») ion wa Nk, COOH d) one carboxylic acid residue and two phosphate i groupe SS oD zea313, 34 315. 316, 32 322, gee Which of the following statements about the assembly of nucleotides in a molecule of deoxyribose nuclei acid (DNA) is correct. a) Apentose of one unit connects to a pentose of another b) A pentose of one unit connects to the base of another ©) Aphosphate of one unit connects to a pentose of another 4) Aphosphate ofone unit connectsto the base of another In DNA, the complementary base are a) uracil and adenine; cytosine and guanine b) adenine and thymine; guanine and cytosine ¢) adenine and thymine; guanine and ura d)_ adenine and guanine; thymine and cytosine Insulin production and its action in human body are responsible for the level of diabetes. This compound belongs to which of the following categories a) anenzyme b) ahormone ©) aco-enzyme 4) an antibiotic A nucleoside on hydrolysis gives a) Aheterocyclic base and orthophosphoric acid b) An aldopentose, a heterocyclic base and orthophosphoric ) Analdopentose and a heterocyclic base d) Analdopentose and a orthophosphoric base Proteins fulfil several functions in living systems. An example of a protein which acts as a hormone is a) casein b) oxytocin ) trypsin ) keratin Kwashiorkar is caused by the deficiency of ) vitamins ) hormones ¢) non essential aminoacid d) essential amino-acid ‘The destruction of the biological nature and activity of proteins by heat or chemical agent is called: a) dehydration b) dematuration c) denitrogenation _—d) deamination Point out the wrong statement about proteins: a) they are nitrogenous organic compounds of high molecular mass b) they on hydrolysis by enzymes give amino acids ¢) many of them are enzymes 4) they do not contain polypet The chemical messenger produced in the endocrine (ductless) glands are grouped as: a) polypeptides b) hormones ©) bile salts 4) purines ‘Nucleotide and nucleosides mainly differ from each other a) presence of phosphate units b)_ presence of base units ) presence of nucleic acids 4) none of the above Je linkages 324. 326. 327, 328. 329, 330. 331, 332. 333, The vitamin that is most readily manufactured in our bodies is: a) vit b) vitamin B ©) vitamin C d) vitamin D ‘A vitamin which plays a vital role in the coagulating property of blood is: a) vitamin a ©) vitamin E Deficiency of which vitamin can cause night blindness b) vitamin D d) vitamin K an eye disease? a) vitamin B, b) vitamin C vitamin By, d) vitamin A Which of the following hormones helps in the conversion of glucose into glycogen in the body? a) insulin b) cortisone )thyroxin d) oxytocin ‘The non-proteinous substances which certain enzymes require for their activity are called: a) catalysts b) inhibitors 6) coenzymes 4) epimers ‘The store house for all biological information is: a) RNA b) mRNA. ¢) DNA 4) none of these What is not true for enzymes? a) they are powerful biocatalysts b) they are all proteins ¢) they are highly specific in their action 4) they do not lose activity on heating Which one is the complimentary base of adenine in one strand to that in the other strand of DNA? 2) cytosine b) guanine ©) uracil ¢) thymine ; ‘Which one is the complimentary base in RNA strand to _ the adenine base in DNA during protein synthesis? a) adenine b) guanine ¢) uracil 4) cytosine The process of formation of RNA from DNA is known as: a) translation ©) replication ¢) mutation Which of the following statements about enzymes is incorrect? A b) transcription a) the catalytic action of an enzyme is not specific b) an enzymatic reaction is highly sensitive to temperature ©) the catalytic action of enzymes is due to their capacity to lower the energy of activation of @ particular reaction, d) none of the above 540 AED‘Which of the following compounds is responsible for the transmission of heredity characters? a) RNA b) DNA Glucose 4) Haemoglobin With one of the pollutant gasos in air haemoglobin of blood undergoes irreversible chemical combination thus, causing death. The gas is: 3) carbonmonoxide _b) carbon dioxide ) sulphurdioxide ——d) ozone ‘Anantigen develops antiobdies which protect the body from their harmful effects. The antibo a) immunoglobulins —_b) phospholipids )albumins 4) lymphocytes In blood, the transport of oxygen from lungs to tissue is carried out by: a) white blood cells (leukocytes) b) red blood cells (erythrocytes) ¢) fibrinogen @) globulins The red colouring matter of blood which transport oxygen contains an element in a system of rings. The element is: a) iron b) magnesium c) cabalt d) calcium Which of the following statements is incorrect? a) Two poynucleotide chains pointing in opposite directions are coiled to form a double helix b) Both helixes are right handed c)_ The helixes have ten nucleotides in each turn d)_ thetwo chains are not complementary to each other ‘The main point of difference between DNA and RNA is: a) presence of thymine in DNA and RNA b) presence of deoxyribose and thymine in DNA, ribose and uracil in RNA ©) presence of ribose and thymine in DNA, deo: and uracil in RNA 4) presence of deoxyribose in DNA and ribose in RNA Insulin has 51 amino acids in two polypeptide chains which are liked by: @) onesulphide bond b) one disulphide bonds <) two disulphide bonds 4) three disulphide bonds A compound which catalyses a chemical reaction in a living organism is called a/an ®) carbohydrate b) enzyme ©) lipid 4) vitamin Biological catalyst (enzymes) belong to: a)” polysaccharides —_b) synthetic polymers ©) polypeptide 4) polyester 344, 345. 346. 347. 348, 349, 350. 351. ‘Which of the following body parts is not composed of structural proteins? a) muscle « b) nails ¢) bones ¢) skin and bone matrix Bases common DNA and RNA are 8) adenine, cytosine, uracil b) guanine, adenine, cytosine ¢) guanine, uracil, thymine 4) adenine, thymine, guanine ‘The function of DNA is a) tosynthesize RNA b) to synthesize the necessary proteins ©) to carry the hereditary characteristics from ‘generation to generation 4) allare correct ‘The sequence in the structure of nucleic acid is: a) base + phosphate group + pentose b) phosphate group + pentose + base <) pentose + base + phosphate group 4) base + pentose + phosphate group Adenosine is an example of a) nucleotide b) nucleoside c) purine base 4) pyrimidine base Inboth DNA and RNA heterocyclic base and phosphate ester linkages are at: a) ChandC! respectively of the sugar molecule b) ChandC} respectively of the sugar molecule ) CjandC} respectively of the sugar molecule 4) ChandC! respectively of the sugar molecule The pyrimidine bases present in DNA are: a) cytosine and adenine b) cytosine and guanine ©) cytosine and thymine 4) cytosine and uracil The presence or absence of hydroxy group on which carbon atom of sugar differentiates RNA and DNA? a) b) 2s ase _ Ee) 1 ‘An organic compound with the formula C,H,,0,, forms a yellow crystalline solid with phenylhydrazine and gives a mixture of sorbitol and mannitol when reduced with sodium. Which among the following could be the compound ? a) fructose b) glucose )_ mannose 4) sucrose In an amino acid, the carboxyl group ionises at, L541 asp apKa, 34 and ammonium ion at pKa, = 9.60. ‘The isoelectric point of the amino acid is at ptt a) 5.97 b) 2.34 <) 9.60 d) 6.97 Violet colour is obtained when dilute CuSO, is added in alkaline solution of protein. This test is known as a) biuret test b) xanthoproteic test c) hopkins-cole test) millon’s test The reason for double helical structure of DNA is operation of a) dipole-dipole interaction b) hydrogen bonding c) electrostatic attractions d) vander Waal’s forces Identify the correct statement regarding enzymes a) enzymes are specific biological catalysts that cannot be poisoned : b) enzymes are normally heterogeneous catalysts that are very specific in their action c) enzymes are specific biological catalysts that can normally function at very high temperatures (T~ 1000K) d) enzymes are specific biological catalysts that possess well-defined active sites Insulin production and its action in human body are responsible for the level of diabetes. This compound belongs to which of the following categories? a) an enzyme b) a hormone c) a co-enzyme d) anantibiotic The term anomers of glucose refers to a) enatiomers of glucose b) isomers of glucose that differ in configuration at carbon one (C-1) c) isomers of glucose that differ in configurations at carbons one and four (C-1 and C-4) d) a mixture of (D) -glucose and (L)-glucose o-D-(+)-glucose and B-D-(+)-glucose are a) conformers b) epimers c) ena d) anomers HAMA)