Biomolecules PYQs Set 5 (PDF)

Set 5 of 11 · Questions 121-150 of 309

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Mere Teacher · Previous Year Questions NEET Chemistry · Biomolecules · Set 5 (Q121-150)
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121. $Which of the following bases are present both in DNA and RNA?$ (1) $C, D$ (2) $B, C$ (3) $A, B$ (4) $A, C$ 122. $Glucose on oxidation with bromine water yields gluconic acid. This reaction confirms presence of$ (1) $six carbon atoms linked in straight chain$ (2) $secondary alcoholic group in glucose$ (3) $aldehyde group in glucose$ (4) $primary alcoholic group in glucose.$ 123. $DNA molecule contains 4 bases whose structure are shown below. One of the structures is not correct, identify the incorrect base structure.$ (1) (2) (3) (4) 124. $The structure of α -D-fructofuranose is$ (1) (2) (3) (4) 125. $In a protein molecule various amino acids are linked together by$ (1) $peptide bond$ (2) $dative bond$ (3) $α ‐glycosidic bond$ (4) $β ‐glycosidic bond.$ 126. $The product(s) formed when glucose reacts with a strong oxidising agent like HNO_{3} is/are$ (1) $COOH (CHOH)_{4} COOH$ (2) $CO_{2}, H_{2} O$ (3) $COOH (CHOH)_{4} CHO$ (4) $CO, CO_{2}, H_{2} O$ 127. $Sulphur containing amino acids of the following are$ (1) $A, D$ (2) $A, C$ (3) $B, C$ (4) $B, D$ 128. $Consider the following structures Which of the pairs represent D and L -fructose, respectively?$ (1) $II and I$ (2) $I and III$ (3) $III and IV$ (4) $II and IV$ 129. $The correct observation in the following reactions is : Sucrose \to Cleavage (Hydrolysis) Gly cos idic bond A + B \to reagent Seliwanof f^{’} s ?$ (1) $Gives no colour$ (2) $Formation of red colour$ (3) $Formation of violet colour$ (4) $Formation of blue colour$ 130. $Which one of the following statements is not true?$ (1) $Lactose contains α -glycosidic linkage between C_{1} of galactose and C_{4} of glucose$ (2) $Lactose is a reducing sugar and it gives Fehling's test$ (3) $On acid hydrolysis, lactose gives one molecule of D (+) -glucose and one molecule of D (+) - galactose$ (4) $Lactose (C_{11} H_{22} O_{11}) is a disaccharide and it contains 8 hydroxyl groups$ 131. $The α - D ‐glucose and β - D ‐glucose differ from each other due to difference in carbon atom with respect to its$ (1) $number of OH groups$ (2) $size of hemiacetal ring$ (3) $conformation$ (4) $configuration.$ 132. $Which of the following hormones contains iodine?$ (1) $Testosterone$ (2) $Adrenaline$ (3) $Thyroxine$ (4) $Insulin$ 133. $Which of the following is an amine hormone.$ (1) $Insulin$ (2) $Progesterone$ (3) $Thyroxine$ (4) $Oxypurin$ 134. $In a protein molecule various amino acid are linked together by [NEET 2016]$ (1) $β-glycosidic bond$ (2) $peptide bond$ (3) $dative bond$ (4) $α-glycosidic bond$ 135. $The peptide that gives positive ceric ammonium nitrate and carbylamines tests is :$ (1) $Ser - Lys$ (2) $Gln - Asp$ (3) $Lys - Asp$ (4) $Asp - Gln$ 136. $Which of the following amino acids is basic in nature?$ (1) $Valine$ (2) $Tyrosine$ (3) $Arginine$ (4) $Leucine$ 137. $The Haworth projection shown below represents$ (1) $β - D - (-) Fructofuranose$ (2) $β - D - (+) Glucopyranose$ (3) $α - D - (-) Fructofuranose$ (4) $α - D - (+) Glucopyranose$ 138. $Which one of the following does not exhibit the phenomenon of mutarotation ?$ (1) $(+) Sucrose$ (2) $(+) Lactose$ (3) $(+) Maltose$ (4) $(-) Fructose$ 139. $Which of the following will react with CHCl_{3} + alc . KOH ?$ (1) $Adenine and thymine$ (2) $Thymine and proline$ (3) $Adenine and lysine$ (4) $Adenine and proline$ 140. $During the denaturation of proteins, which of these structures will remain intact?$ (1) $Primary$ (2) $Secondary$ (3) $Tertiary$ (4) $Quaternary$ 141. $If one strand of a DNA has the sequence ATGCTTCA, sequence of the bases in complementary strand is:$ (1) $CATTAGCT$ (2) $TACGAAGT$ (3) $GTACTTAC$ (4) $ATGCGACT$ 142. $Which one given below is a non-reducing sugar? [NEET 2016]$ (1) $Lactose$ (2) $Glucose$ (3) $Sucrose$ (4) $Maltose$ 143. $In the given pentapeptide, find out an essential amino acid (Y) and the sequence present in the pentapeptide: Choose the correct answer from the options given below:$ (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) $(Y) Sequence Threonine Thr-Ser-Asp-Gly-Ala$ 144. $The correct name of the following polymer is :$ (1) $Polyisobutane$ (2) $Polytert -butylene$ (3) $Polyisoprene$ (4) $Polyisobutylene$ 145. $The carbohydrate "Ribose" present in DNA, is A. A pentose sugar B. present in pyranose from C. in "D" configuration D. a reducing sugar, when free E. in \propto -anomeric form Choose the correct answer from the options given below:$ (1) $A, D and E Only$ (2) $A, C and D Only$ (3) $A, B and E Only$ (4) $B, D and E Only$ 146. $Sulphur (S) containing amino acids from the following are: (A) isoleucine (B) cysteme (C) lysine (D)methionine (E) glutamic acid$ (1) $B, C, E$ (2) $A,B, C$ (3) $B, D$ (4) $A, D$ 147. $In D - glucose (X) and D - Fructose (Y), which hydroxyl group participates in hemiacetal formation$ (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) $C - 4 in both X and Y$ 148. $The correct match between Item I and Item II is : Item I Item II (A) Ester test (P) Tyr (B) Carbylamine test (Q) AsP (C) Phthalein dye test (R) Ser (S) Lys$ (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) $(A) \to (Q); (B) \to (S); (C) \to (R)$ 149. $The naturally occurring amino acid that contains only one basic functional group in its chemical structure is$ (1) $asparagine$ (2) $histidine$ (3) $arginine$ (4) $lysine$ 150. $Which of the following statements is not true about glucose? [NEET 2020]$ (1) $It is an aldohexose.$ (2) $It contains five hydroxyl groups.$ (3) $It is a reducing sugar.$ (4) $It is an aldopentose.$