Biomolecules PYQs Set 7 (PDF)

Set 7 of 11 · Questions 181-210 of 309

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Mere Teacher · Previous Year Questions NEET Chemistry · Biomolecules · Set 7 (Q181-210)
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181. $Hydrolysis of sucrose gives :$ (1) $α -D-(-)-Glucose and β - D -_{(} -_{)} -Fructose$ (2) $α -D-(+)-Glucose and α - D -_{(} -_{)} -Fructose$ (3) $α -D-(-)-Glucose and α -D-(+)-Fructose$ (4) $α -D-(+)-Glucose and β - D -_{(} -_{)} -Fructose$ 182. $Sucrose on hydrolysis gives [NEET 2020]$ (1) $β-D-glucose + α-D-fructose$ (2) $α-D-glucose +β-D-glucose$ (3) $α-D-glucose +β-D-fructose$ (4) $α-D-fructose +β-D-fructose$ 183. $Glycolysis is$ (1) $oxidation of glucose to glutamate$ (2) $conversion of p)^{γ} ruvate to citrate$ (3) $oxidation of glucose to pyruvate$ (4) $conversion of glucose to haem.$ 184. $The human body does not produce$ (1) $enzymes$ (2) $DNA$ (3) $vitamins$ (4) $hormones$ 185. $Enzymes are made up of$ (1) $edible proteins$ (2) $proteins with specific structure$ (3) $nitrogen containing carbohydrates$ (4) $carbohydrates.$ 186. $Haemoglobin is$ (1) $a vitamin$ (2) $a carbohydrate$ (3) $an enzyme$ (4) $a globular protein.$ 187. $What is the basic formula for starch?$ (1) $(C_{6} H_{12} O_{6})_{n}$ (2) $(C_{6} H_{10} O_{5})_{n}$ (3) $C_{12} H_{22} O_{11}$ (4) $(C_{6} H_{12} O_{4})_{4}$ 188. $Given below are two statements: Statement I: Sucrose is dextrorotatory. However, sucrose upon hydrolysis gives a solution having mixture of products. This solution shows laevorotation. Statement II: Hydrolysis of sucrose gives glucose and fructose. Since the laevorotation of glucose is more than the dextrorotation of fructose, the resulting solution becomes laevorotatory. In the light of the above statements, choose the correct answer from the options given below$ (1) $Statement I is true but Statement II is false$ (2) $Statement I is false but Statement II is true$ (3) $Both Statement I and Statement II are false$ (4) $Both Statement I and Statement II are true$ 189. $In DNA, the complimentary bases are$ (1) $adenine and guanine; thymine and cytosine$ (2) $uracil and adenine; cytosine and guanine$ (3) $adenine and thymine; guanine and cytosine$ (4) $adenine and thymine; guanine and uracil$ 190. $The pyrimidine bases present in DNA are$ (1) $cytosine and guanine$ (2) $cytosine and thymine$ (3) $cytosine and uracil$ (4) $cytosine and adenine$ 191. $Which of the following is a condensation polymer ?$ (1) $Buna -S$ (2) $Neoprene$ (3) $Teflon$ (4) $Nylon 6, 6$ 192. $Which of the following vitamins cannot be stored in the body?$ (1) $A$ (2) $C$ (3) $E$ (4) $K$ 193. $Which of the following is NOT an example of fibrous protein ?$ (1) $Keratin$ (2) $Albumin$ (3) $Collagen$ (4) $Myosin$ 194. $Sugar moiety in DNA and RNA molecules respectively are$ (1) $β -D-2-deoxyribose, β -D-deoxyribose$ (2) $β -D-2-deoxyribose, β -D-ribose$ (3) $β -D-ribose, β -D-2-deoxyribose$ (4) $β -D-deoxyribose, β -D-2-deoxyribose$ 195. $The two functional groups present in a typical carbohydrate are :$ (1) $-CHO and -COOH$ (2) $>C=O and -OH$ (3) $-OH and -CHO$ (4) $-OH and -COOH$ 196. $Which of the following is the incorrect statement about maltose?$ (1) $It is a reducing sugar$ (2) $It is composed of two α -D-glucose units$ (3) $It is composed of one β -D- glucose and one β - D galactose unit$ (4) $It has 1, 4-glycosidic linkage$ 197. $The deficiency of which vitamin causes pernicious anaemia?$ (1) $Vitamin B_{2}$ (2) $Vitamin B_{6}$ (3) $Vitamin E$ (4) $Vitamin B_{12}$ 198. $Which of the following pairs give positive Tollen’s Test ?$ (1) $Glucose, sucrose$ (2) $Glucose, fructose$ (3) $Hexanol, acetophenone$ (4) $Fructose, sucrose$ 199. $What is the value of specific rotation exhibited by glucose molecule?$ (1) $+ 52.7^{\circ}$ (2) $- 92.4^{\circ}$ (3) $+ 66.5^{\circ}$ (4) $+ 40.3^{\circ}$ 200. $What type of sugar molecule is present in DNA?$ (1) $D-3-Deoxyribose$ (2) $D-Ribose$ (3) $D-2-Deoxyribose$ (4) $D-Glucopyranose$ 201. $A polysaccharide 'X' on boiling with dil H_{2} S O_{4} at 393 K under 2-3 atm pressure yields 'Y'. 'Y' on treatment with bromine water gives gluconic acid. 'X' contains β -glycosidic linkages only.Compound 'X' is :$ (1) $starch$ (2) $cellulose$ (3) $amylose$ (4) $amylopectin$ 202. $The Zwitter ion among the following is$ (1) $R - C H (N H_{2}) - C (= O) - O H$ (2) (3) (4) $R - C H (N H_{3}^{+}) - C (= O) - O^{-}$ 203. $Fructose and glucose can be distinguished by :$ (1) $Benedict's test$ (2) $Fehling's test$ (3) $Barfoed' test$ (4) $Seliwanoff's test$ 204. $Which is not true for arginine?$ (1) $It has a fairly high melting point$ (2) $It is associated with more than one p K_{a} values.$ (3) $It has high solubility in benzene.$ (4) $It is a crystalline solid.$ 205. $The cell membranes are mainly composed of$ (1) $fats$ (2) $proteins$ (3) $phospholipids$ (4) $carbohydrates$ 206. $In DNA, the linkages between different nitrogenous bases are$ (1) $phosphate linkage$ (2) $H ‐bonding$ (3) $glycosidic linkage$ (4) $peptide linkage$ 207. $Identify the essential amino acids from below : (A) Valine (B) Proline (C) Lysine (D) Threonine. (E) Tyrosine Choose the correct answer from the options given below:$ (1) $(A), (C) and (E) only$ (2) $(A), (C) and (D) only$ (3) $(C), (D) and (E) only$ (4) $(B), (C) and (E) only$ 208. $Which of the following is not an essential amino acid?$ (1) $Tyrosine$ (2) $Valine$ (3) $Lysine$ (4) $Leucine$ 209. $Stability of α - Helix structure of proteins depends upon$ (1) $dipolar interaction$ (2) $H-bonding interaction$ (3) $van der Waals forces$ (4) $π -stacking interaction$ 210. $The major product of the reaction is :$ (1) (2) (3) (4)