Biomolecules PYQs Set 10 (PDF)

Set 10 of 11 · Questions 271-300 of 309

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Mere Teacher · Previous Year Questions NEET Chemistry · Biomolecules · Set 10 (Q271-300)
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271. $The product ' Q' of the following reactions is$ (1) (2) (3) (4) 272. $A sugar 'X' dehydrates very slowly under acidic condition to give furfural which on further reaction with resorcinol gives the coloured product after sometime. Sugar 'X' is$ (1) $Aldopentose$ (2) $Aldotetrose$ (3) $Oxalic acid$ (4) $Ketotetrose$ 273. $Given below are two statements. Statments I: Maltose has two α -D-glucose units linked at C_{1} and C_{4} and is a reducing sugar. Statement II: Maltose has two monosaccharides: α -D-glucose and β -D-glucose linked at C_{1} and C_{6} and it is a non-reducing sugar. choose the correct answer from the options given below.$ (1) $Both Statement I and Statement II are true$ (2) $Both Statement I and Statement II are false$ (3) $Statement I is true but Statement II is false$ (4) $Statement I is false but Statement II is true$ 274. $The correct structure of Rhumann's Purple, the compound formed in the reaction of ninhydrin with proteins is:$ (1) (2) (3) (4) 275. $The formulas of A and B for the following reaction sequence are$ (1) $A = C_{7} H_{14} O_{8},B = C_{6} H_{14}$ (2) $A = C_{7} H_{13} O_{7}, B = C_{7} H_{14} O$ (3) $A = C_{7} H_{12} O_{8}, B = C_{6} H_{14}$ (4) $A = C_{7} H_{14} O_{8}, B = C_{6} H_{14} O_{6}$ 276. $Which of the following reagents converts - CH_{2} OH group of glucose to - COOH group?$ (1) $Dil. nitric acid$ (2) $Hydrogen cyanide$ (3) $Hydroxyl amine$ (4) $Acetic anhydride$ 277. $Statement-1 : Glucose gives a reddish-brown precipitate with Fehling's solution. Statement-2 : Reaction of glucose with Fehling's solution gives CuO and gluconic acid.$ (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) $Statement-1 is False, Statement-2 is True$ 278. $The major product of the following reaction is Glucose (i) HI, Δ (ii) Mo_{2} O_{3}, 773 K, 10-20 atm$ (1) $Cyclohexane$ (2) $Benzene$ (3) $Cyclohexadiene$ (4) $Hexane$ 279. $In both DNA and RNA, heterocylic base and phosphate ester linkages are at$ (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) $C5' and C1' respectively of the sugar molecule.$ 280. $Which carbon atom of glucose, numbered from C \times 1 to C - 6 converts its functional group to - COOH group when heated with Br_{2} water?$ (1) $C - 1$ (2) $C - 4$ (3) $C - 2$ (4) $C - 6$ 281. $Which of the following compounds can form a zwitter ion?$ (1) $Aniline$ (2) $Acetanilide$ (3) $Benzoic acid$ (4) $Glycine$ 282. $The functional groups present in Asparagine, a nonessential amino acid, are$ (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) $- NH_{2}, - COOH, - OH$ 283. $Which one of the following is correct structure for cytosine ?$ (1) (2) (3) (4) 284. $During conversion of glucose into glucose cyanohydrin, what functional group/atom of glucose is replaced?$ (1) $Hydrogen$ (2) $Aldehydic group$ (3) $Primary alcoholic group$ (4) $Secondary alcoholic group$ 285. $What is the combining ratio of glycerol and fatty acids when they combine to form triglyceride?$ (1) $3; 4$ (2) $3 : 2$ (3) $1 : 3$ (4) $1 : 2$ 286. $The correct corresponding order of names of four aldoses with configuration given below respectively, is$ (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) $D ‐erythrose, D ‐threose, L ‐erythrose, L ‐threose.$ 287. $A dipeptide, " x " on complete hydrolysis gives " y " and " z ". " y " on treatment with aq. HNO_{2} produces lactic acid. On the other hand "z" on heating gives the following cyclic molecule. Based on the information given, the dipeptide X is:$ (1) $alanine-alanine$ (2) $valine-glycine$ (3) $valine-leucine$ (4) $alanine-glycine$ 288. $Which of the following is the correct structure$ (1) (2) (3) (4) 289. $When sugar X' is boiled with dilute H_{2} S O_{4} in alcoholic solution, two isomers 'A' and 'B' are formed. 'A' on oxidation with H N O_{3} yields saccharic acid where as 'B' is laevorotatory. The compound 'X' is :$ (1) $Maltose$ (2) $Sucrose$ (3) $Lactose$ (4) $Strach$ 290. $In nucleoside, the base is attached to which position of sugar molecule?$ (1) $C - 1$ (2) $C - 2$ (3) $C - 3$ (4) $C - 5$ 291. $D (+) ‐glucose reacts with hydroxyl amine and yields an oxime. The structure of the oxime would be$ (1) (2) (3) (4) 292. $Which of the following is the correct structure of L-Glucose?$ (1) (2) (3) (4) 293. $Find the reagent that oxidises glucose into saccharic acid?$ (1) $Br_{2}, H_{2} O$ (2) $HI, Δ$ (3) $HNO_{3}, H_{2} O$ (4) $HCN$ 294. $What type of peptide is the glycylalanine?$ (1) $Dipeptide$ (2) $Tripeptide$ (3) $Tetrapeptide$ (4) $Pentapeptide$ 295. $The general structural formula of α -amino acid is The group R in tryptophan (X) and histidine (Y) are respectively$ (1) (2) (3) (4) 296. $For the below given cyclic hemiacetal (X), the correct pyranose structure is :$ (1) (2) (3) (4) 297. $Match List I with List II List - I A. Glucose / NaHCO_{3} /Δ B. Glucose / HNO_{3} C. Glucose / HI /Δ D. Glucose / Bromine water List - II I. Gluconic acid II. No reaction III. n-hexane IV. Saccharic acid Choose the correct answer from the options given below:$ (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) $A-I, B-IV, C-III, D-II$ 298. $Identify the product of the following reaction. (C_{6} H_{10} O_{5})_{n} + n H_{2} O \to H + 393 K 2 - 3 atm ?$ (1) $Fructose$ (2) $Glucose$ (3) $Lactose$ (4) $Maltose$ 299. $Identify the monosaccharide containing only one asymmetric carbon atom in its molecule.$ (1) $Ribulose$ (2) $Ribose$ (3) $Erythrose$ (4) $Glyceraldehyde$ 300. $Two nucleotides are joined together by a linkage known as :$ (1) $Phosphodiester linkage$ (2) $Glycosidic linkage$ (3) $Disulphide linkage$ (4) $Peptide linkage$