Biomolecules PYQs Set 6 (PDF)

Set 6 of 12 · Questions 151-180 of 335

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Mere Teacher · Previous Year Questions JEE Main Chemistry · Biomolecules · Set 6 (Q151-180)
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151. $Which one of the following does not exhibit the phenomenon of mutarotation ?$ (1) $(+) Sucrose$ (2) $(+) Lactose$ (3) $(+) Maltose$ (4) $(-) Fructose$ 152. $Which of the following will react with CHCl_{3} + alc . KOH ?$ (1) $Adenine and thymine$ (2) $Thymine and proline$ (3) $Adenine and lysine$ (4) $Adenine and proline$ 153. $During the denaturation of proteins, which of these structures will remain intact?$ (1) $Primary$ (2) $Secondary$ (3) $Tertiary$ (4) $Quaternary$ 154. $If one strand of a DNA has the sequence ATGCTTCA, sequence of the bases in complementary strand is:$ (1) $CATTAGCT$ (2) $TACGAAGT$ (3) $GTACTTAC$ (4) $ATGCGACT$ 155. $Which one given below is a non-reducing sugar? [NEET 2016]$ (1) $Lactose$ (2) $Glucose$ (3) $Sucrose$ (4) $Maltose$ 156. $In the given pentapeptide, find out an essential amino acid (Y) and the sequence present in the pentapeptide: Choose the correct answer from the options given below:$ (1) $(Y) Sequence Serine Ser-Asp-Thr-Ala-Gly$ (2) $(Y) Sequence Serine Thr-Ser-Asp-Ala-Gly$ (3) $(Y) Sequence Threonine Ser-Thr-Asp-Gly-Ala$ (4) $(Y) Sequence Threonine Thr-Ser-Asp-Gly-Ala$ 157. $The correct name of the following polymer is :$ (1) $Polyisobutane$ (2) $Polytert -butylene$ (3) $Polyisoprene$ (4) $Polyisobutylene$ 158. $The carbohydrate "Ribose" present in DNA, is A. A pentose sugar B. present in pyranose from C. in "D" configuration D. a reducing sugar, when free E. in \propto -anomeric form Choose the correct answer from the options given below:$ (1) $A, D and E Only$ (2) $A, C and D Only$ (3) $A, B and E Only$ (4) $B, D and E Only$ 159. $Sulphur (S) containing amino acids from the following are: (A) isoleucine (B) cysteme (C) lysine (D)methionine (E) glutamic acid$ (1) $B, C, E$ (2) $A,B, C$ (3) $B, D$ (4) $A, D$ 160. $In D - glucose (X) and D - Fructose (Y), which hydroxyl group participates in hemiacetal formation$ (1) $C - 5 in both X and Y$ (2) $C - 5 in X and C - 6 in Y$ (3) $C - 6 in X and C - 5 in Y$ (4) $C - 4 in both X and Y$ 161. $The correct match between Item I and Item II is : Item I Item II (A) Ester test (P) Tyr (B) Carbylamine test (Q) AsP (C) Phthalein dye test (R) Ser (S) Lys$ (1) $(A) \to (Q, R); (B) \to (S); (C) \to (P)$ (2) $(A) \to (R); (B) \to (Q); (C) \to (P)$ (3) $(A) \to (R); (B) \to (S); (C) \to(Q)$ (4) $(A) \to (Q); (B) \to (S); (C) \to (R)$ 162. $The naturally occurring amino acid that contains only one basic functional group in its chemical structure is$ (1) $asparagine$ (2) $histidine$ (3) $arginine$ (4) $lysine$ 163. $Which of the following statements is not true about glucose? [NEET 2020]$ (1) $It is an aldohexose.$ (2) $It contains five hydroxyl groups.$ (3) $It is a reducing sugar.$ (4) $It is an aldopentose.$ 164. $What is the volume of water consumed during acid hydrolysis of 1.368 kg of sucrose? (Given : Molar masses of sucrose = 342, water = 18, density of water = 1 g / cm^{3})$ (1) $0.072 dm^{3}$ (2) $0.720 dm^{3}$ (3) $0.18 dm^{3}$ (4) $0.018 dm^{3}$ 165. $Whcih of the following compounds will behave as a reducing sugar in an aqueous KOH solution?$ (1) (2) (3) (4) 166. $Glucose does not react with which of the following.$ (1) $NH_{2} OH$ (2) $HCN$ (3) $Br_{2} / Water$ (4) $NaHSO_{3}$ 167. $Assertion (A) : Both Glucose and Fructose have the same D-configuration.Reason (R) : Both Glucose and Fructose are dextrorotatory.The correct option among the following is:$ (1) $(A) is true, (R) is true and (R) is the correct explanation for (A)$ (2) $(A) is true, (R) is true but (R) is not the correct explanation for (A)$ (3) $(A) is true but (R) is false$ (4) $(A) is false but (R) is true$ 168. $The correct statement about gluconic acid is$ (1) $It is prepared by oxidation of glucose with HNO_{3}$ (2) $It is obtained by partial oxidation of glucose$ (3) $It is dicarboxylic acid$ (4) $It forms hemiacetal or acetal$ 169. $The homopolymer formed from 4-hydroxy - butanoic acids is :$ (1) $- [O - C (= O) (C H_{2})_{3} - O]_{n} -$ (2) $- [O - C (= O) (C H_{2})_{2} - C (= O)]_{n} -$ (3) $- [O - C (= O) - (C H_{2})_{2} - C (= O) - O]_{n} -$ (4) $- [C (= O) (C H_{2})_{3} - O]_{n} -$ 170. $Glucose and Galactose are having identical configuration in all the positions except position.$ (1) $C - 3$ (2) $C - 4$ (3) $C - 2$ (4) $C - 5$ 171. $Poly - β - hydroxybutyrate -co- β hydroxy valetrate (PHBV) is a copolymer of _______.$ (1) $3-Hydroxybtyrate acid and 4- Hydroxypentanoic acid$ (2) $2-Hydroxybtyrate acid and 3- Hydroxypentanoic acid$ (3) $3-Hydroxybtyrate acid and 2- Hydroxypentanoic acid$ (4) $3-Hydroxybtyrate acid and 3- Hydroxypentanoic acid$ 172. $Which one of the following is the structure of lactose?$ (1) (2) (3) (4) 173. $D - (+) -glucose reacts with hydroxyl amine and yields an oxime. The structure of the oxime would be$ (1) (2) (3) (4) 174. $Which functional group participates in disulphide bond formation in proteins?$ (1) $Thioester$ (2) $Thioether$ (3) $Thiol$ (4) $Thiolactone$ 175. $Which of the following is reducing sugar?$ (1) (2) (3) (4) 176. $Which of the following statements is not true about sucrose ?$ (1) $It is a non reducing sugar.$ (2) $The glycosidic linkage is present between C_{1} of α -glucose and C_{1} of β -fructose$ (3) $It is also named as invert sugar.$ (4) $On hydrolysis, it produces glucose and fructose.$ 177. $The incorrect statement regarding the given structure is$ (1) $can be oxidized to a dicarboxylic acid with Br_{2} water$ (2) $will coexist in equilibrium with 2 other cyclic structure$ (3) $despite the presence of - CHO does not give Schiff's test$ (4) $has 4 asymmetric carbon atom$ 178. $Uracil is base present in RNA with the following structure. % of N in uracil is_______. Molar mass N = 14 g m o l^{- 1}; O = 16 g m o l^{- 1}; C = 12 g m o l^{- 1};H=1g m o l^{- 1};$ 179. $The number of oxygens present in a nucleotide formed from a base, that is present only in RNA is ________ .$ 180. $Vanillin compound obtained from vanilla beans, has total sum of oxygen atoms and π electrons is ______$