Biomolecules PYQs Set 11 (PDF)

Set 11 of 12 · Questions 301-330 of 335

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Mere Teacher · Previous Year Questions JEE Main Chemistry · Biomolecules · Set 11 (Q301-330)
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301. $Which of the following reagents converts - CH_{2} OH group of glucose to - COOH group?$ (1) $Dil. nitric acid$ (2) $Hydrogen cyanide$ (3) $Hydroxyl amine$ (4) $Acetic anhydride$ 302. $Statement-1 : Glucose gives a reddish-brown precipitate with Fehling's solution. Statement-2 : Reaction of glucose with Fehling's solution gives CuO and gluconic acid.$ (1) $Statement-1 is True, Statement-2 is True; Statement-2 is a correct explanation for Statement-1.$ (2) $Statement-1 is True, Statement-2 is True; Statement-2 is NOT a correct explanation for Statement-1$ (3) $Statement-1 is True, Statement-2 is False$ (4) $Statement-1 is False, Statement-2 is True$ 303. $The major product of the following reaction is Glucose (i) HI, Δ (ii) Mo_{2} O_{3}, 773 K, 10-20 atm$ (1) $Cyclohexane$ (2) $Benzene$ (3) $Cyclohexadiene$ (4) $Hexane$ 304. $In both DNA and RNA, heterocylic base and phosphate ester linkages are at$ (1) $C5' and C2' respectively of the sugar molecule$ (2) $C2' and C5' respectively of the sugar molecule$ (3) $C1' and C5' respectively of the sugar molecule$ (4) $C5' and C1' respectively of the sugar molecule.$ 305. $Which carbon atom of glucose, numbered from C \times 1 to C - 6 converts its functional group to - COOH group when heated with Br_{2} water?$ (1) $C - 1$ (2) $C - 4$ (3) $C - 2$ (4) $C - 6$ 306. $Which of the following compounds can form a zwitter ion?$ (1) $Aniline$ (2) $Acetanilide$ (3) $Benzoic acid$ (4) $Glycine$ 307. $The functional groups present in Asparagine, a nonessential amino acid, are$ (1) $- NH_{2}, - COOH, = NH$ (2) $- N H_{2}, - C O O H, - C (= O) - N H_{2}$ (3) $- N H - C (= O) -, - C O O H, - C (= O) - C l$ (4) $- NH_{2}, - COOH, - OH$ 308. $Which one of the following is correct structure for cytosine ?$ (1) (2) (3) (4) 309. $During conversion of glucose into glucose cyanohydrin, what functional group/atom of glucose is replaced?$ (1) $Hydrogen$ (2) $Aldehydic group$ (3) $Primary alcoholic group$ (4) $Secondary alcoholic group$ 310. $What is the combining ratio of glycerol and fatty acids when they combine to form triglyceride?$ (1) $3; 4$ (2) $3 : 2$ (3) $1 : 3$ (4) $1 : 2$ 311. $The correct corresponding order of names of four aldoses with configuration given below respectively, is$ (1) $L ‐erythrose, L ‐threose, L ‐erythrose, D ‐threose$ (2) $D ‐threose, D ‐erythrose, L ‐threose, L ‐erythrose$ (3) $L ‐erythrose, L ‐threose, D ‐erythrose, D ‐threose$ (4) $D ‐erythrose, D ‐threose, L ‐erythrose, L ‐threose.$ 312. $A dipeptide, " x " on complete hydrolysis gives " y " and " z ". " y " on treatment with aq. HNO_{2} produces lactic acid. On the other hand "z" on heating gives the following cyclic molecule. Based on the information given, the dipeptide X is:$ (1) $alanine-alanine$ (2) $valine-glycine$ (3) $valine-leucine$ (4) $alanine-glycine$ 313. $Which of the following is the correct structure$ (1) (2) (3) (4) 314. $When sugar X' is boiled with dilute H_{2} S O_{4} in alcoholic solution, two isomers 'A' and 'B' are formed. 'A' on oxidation with H N O_{3} yields saccharic acid where as 'B' is laevorotatory. The compound 'X' is :$ (1) $Maltose$ (2) $Sucrose$ (3) $Lactose$ (4) $Strach$ 315. $In nucleoside, the base is attached to which position of sugar molecule?$ (1) $C - 1$ (2) $C - 2$ (3) $C - 3$ (4) $C - 5$ 316. $D (+) ‐glucose reacts with hydroxyl amine and yields an oxime. The structure of the oxime would be$ (1) (2) (3) (4) 317. $Which of the following is the correct structure of L-Glucose?$ (1) (2) (3) (4) 318. $Find the reagent that oxidises glucose into saccharic acid?$ (1) $Br_{2}, H_{2} O$ (2) $HI, Δ$ (3) $HNO_{3}, H_{2} O$ (4) $HCN$ 319. $What type of peptide is the glycylalanine?$ (1) $Dipeptide$ (2) $Tripeptide$ (3) $Tetrapeptide$ (4) $Pentapeptide$ 320. $The general structural formula of α -amino acid is The group R in tryptophan (X) and histidine (Y) are respectively$ (1) (2) (3) (4) 321. $For the below given cyclic hemiacetal (X), the correct pyranose structure is :$ (1) (2) (3) (4) 322. $Match List I with List II List - I A. Glucose / NaHCO_{3} /Δ B. Glucose / HNO_{3} C. Glucose / HI /Δ D. Glucose / Bromine water List - II I. Gluconic acid II. No reaction III. n-hexane IV. Saccharic acid Choose the correct answer from the options given below:$ (1) $A-IV, B-I, C-III, D-II$ (2) $A-II, B-IV, C-III, D-I$ (3) $A-III, B-II, C-I, D-IV$ (4) $A-I, B-IV, C-III, D-II$ 323. $Identify the product of the following reaction. (C_{6} H_{10} O_{5})_{n} + n H_{2} O \to H + 393 K 2 - 3 atm ?$ (1) $Fructose$ (2) $Glucose$ (3) $Lactose$ (4) $Maltose$ 324. $Identify the monosaccharide containing only one asymmetric carbon atom in its molecule.$ (1) $Ribulose$ (2) $Ribose$ (3) $Erythrose$ (4) $Glyceraldehyde$ 325. $Two nucleotides are joined together by a linkage known as :$ (1) $Phosphodiester linkage$ (2) $Glycosidic linkage$ (3) $Disulphide linkage$ (4) $Peptide linkage$ 326. $The major product of the following reaction is : (1) KOH (alc .) (2) Free radical polymerisation$ (1) (2) (3) (4) 327. $One mole of stachyose on hydrolysis yields$ (1) $1 mole of glucose +1 mole of fructose +2 moles of galactose$ (2) $2 moles of glucose +1 mole of fructose +1 mole of galactose$ (3) $1 mole of glucose +2 moles of fructose +1 mole of galactose$ (4) $2 moles of glucose +2 moles of fructose.$ 328. $Which of the following correctly represents hydrogen bonded pairs in DNA?$ (1) $G = C; T \equiv A$ (2) $G = C; T = A$ (3) $G \equiv C; T \equiv A$ (4) $G \equiv C; T = A$ 329. $Identify the correct set of monosaccharides present in sucrose (X), lactose (Y) and maltose (Z) . X Y Z$ (1) $X: glucose, fructose; Y: galactose, glucose; Z: glucose, fructose$ (2) $X: glucose, fructose; Y: galactose, glucose; Z: glucose, glucose$ (3) $X: glucose, glucose; Y: galactose, glucose; Z: glucose, glucose$ (4) $X: galactose, glucose; Y: glucose, fructose; Z: glucose, glucose$ 330. $The number of chiral carbons present in sucrose is \dots \dots \dots \dots \dots \dots \dots \dots .$