Biomolecules PYQs Set 8 (PDF)

Set 8 of 11 · Questions 211-240 of 309

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Mere Teacher · Previous Year Questions NEET Chemistry · Biomolecules · Set 8 (Q211-240)
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211. $Which one among the following chemical tests is used to distinguish monosaccharide from disaccharide ?$ (1) $Seliwanoff's test$ (2) $Iodine test$ (3) $Barfoed test$ (4) $Tollen's test$ 212. $Thiol group is present in :$ (1) $Cystine$ (2) $Cysteine$ (3) $Methionine$ (4) $Cytosine$ 213. $Consider the following rections: (i) Glucose + ROH ⟶ dryHCI Acetal \frac{x eq . of}{( CH _{3} CO ) _{2} O} acetyl derivative (ii) Glucose ⟶ Ni / H_{2} A \frac{y eq . of}{( CH _{3} CO ) _{2} O} acetyl derivative (iii) Glucose \frac{z eq . of}{( CH _{3} CO ) _{2} O} acetyl derivative' x', ' y' and ' z' in these reactions are respectively.$ (1) $4,5 & 5$ (2) $4,6 & 5$ (3) $5,4 & 5$ (4) $5,6 & 5$ 214. $The two monomers for the synthesis of nylon 6, 6 are :$ (1) $HOOC (C H_{2})_{4} COOH, H_{2} N (C H_{2})_{6} N H_{2}$ (2) $HOOC (C H_{2})_{6} COOH, H_{2} N (C H_{2})_{6} N H_{2}$ (3) $HOOC (C H_{2})_{4} COOH, H_{2} N (C H_{2})_{4} N H_{2}$ (4) $HOOC (C H_{2})_{6} COOH, H_{2} N (C H_{2})_{4} N H_{2}$ 215. $The oxidation of glucose is one of the most important reactions in a living cell. What is the number of ATP molecules generated in cells from one molecule of glucose?$ (1) $28$ (2) $38$ (3) $12$ (4) $18$ 216. $Which of the statements about“Denaturation”given below are correct. (1) Denaturation of proteins causes loss of secondary and tertiary structures of the protein(2). Denaturation leads to the conversion of double strand of DNA into single strand(3). Denaturation affects primary structure which gets distorted.$ (1) $(2) and (3)$ (2) $(1) and (3)$ (3) $(1) and (2)$ (4) $(1), (2) and (3)$ 217. $Synthesis of each molecule of glucose in photosynthesis involves :$ (1) $18 molecules of ATP$ (2) $10 molecules of ATP$ (3) $8 molecules of ATP$ (4) $6 molecules of ATP$ 218. $On hydrolysis of starch, we finally get$ (1) $glucose$ (2) $fructose$ (3) $both(a) and (b)$ (4) $sucrose.$ 219. $Number of cyclic tripeptides formed with 2 amino acids A and B is:$ (1) $2$ (2) $3$ (3) $5$ (4) $4$ 220. $The compound 'A' is a complementary base of in DNA stands.$ (1) $Uracil$ (2) $Guanine$ (3) $Adenine$ (4) $Cytosine$ 221. $Assertion (A) : In aqueous solution, amino acids exist in dipolar ion form. Reason (R) : Most of the naturally occurring amino acids have L-configuration. The correct option among the following is$ (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) $(A) is false but (R) is true$ 222. $Which of the glycosidic linkage galactose and glucose is present in lactose?$ (1) $C-1 of glucose and C-6 of galactose$ (2) $C-1 of galactose and C-4 of glucose$ (3) $C-1 of glucose and C-4 of galactose$ (4) $C-1 of galactose and C-6 of glucose$ 223. $Which one of the following statements is correct?$ (1) $All amino acids except lysine are optically active$ (2) $All amino acids are optically active$ (3) $All amino acids except glycine are optically active$ (4) $All amino acids except glutamic acids are optically active$ 224. $The correct structure of histidine in a strongly acidic solution (pH=2) is :$ (1) (2) (3) (4) 225. $The number of six and five membered rings present in norethindrone (a synthetic progesterone) are respectively$ (1) $2 and 2$ (2) $3 and 1$ (3) $3 and 3$ (4) $3 and 2$ 226. $Given below are two statements: Statement I: Fructose does not contain an aldehydic group but still reduces Tollen's reagent Statement II: In the presence of base, fructose undergoes rearrangement to give glucose. choose the correct answer from the options given below$ (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) $Statement I is false but Statement II is true$ 227. $The correct structure of product ‘P’ in the following reactio is: Asn - Ser + (C H_{3} CO)_{2} O NE t_{3} P (excess)$ (1) (2) (3) (4) 228. $Out of following isomeric forms of uracil, which one is present in RNA ?$ (1) (2) (3) (4) 229. $Number of chiral carbons in β - D -_{(} +_{)} glucose is$ (1) $five$ (2) $six$ (3) $three$ (4) $four$ 230. $Major product of the following reaction is : (1) E t_{3} N (2) Free radical polymerisation$ (1) (2) (3) (4) 231. $Following tetrapeptide can be represented as (F, L, D, Y, I, Q, P are one letter codes for amino acids)$ (1) $FIQY$ (2) $FLDY$ (3) $YQLF$ (4) $PLDY$ 232. $Which is not true statement?$ (1) $α ‐carbon of α ‐amino acid is asymmetric.$ (2) $All proteins are found in L ‐form.$ (3) $Human body can synthesise all proteins they need.$ (4) $At p H = 7 both amino and carboxylic groups exist in ionised form.$ 233. $Which carbon atom of deoxyribose sugar in DNA does not contain bond?$ (1) $C_{5}$ (2) $C_{3}$ (3) $C_{2}$ (4) $C_{1}$ 234. $The structure of Nylon-6 is :$ (1) $- [(C H_{2})_{4} - C (= O) - N (H)]_{n} -$ (2) $- [C (= O) - (C H_{2})_{6} - N (H)]_{n} -$ (3) $- [C (= O) - (C H_{2})_{5} - N (H)]_{n} -$ (4) $- [(C H_{2})_{6} - C (= O) - N (H)]_{n} -$ 235. $Two monomers in maltose are$ (1) $α - D - Glucose, α - D - Glucose$ (2) $α - D - Glucose, β - D - Glucose$ (3) $α - D - Galactose, β - D - Glucose$ (4) $β - D - Galactose ,α-D-Glucose$ 236. $The following carbohydrate is$ (1) $a ketohexose$ (2) $an aldohexose$ (3) $an α-furanose$ (4) $an α-pyranose$ 237. $Which among the following pairs of Vitamins is stored in our body relatively for longer duration?$ (1) $Thiamine and Vitamin A$ (2) $Vitamin A and Vitamin D$ (3) $Thiamine and Ascorbic acid$ (4) $Ascorbic acid and Vitamin D$ 238. $Match List I with List II List I (Bio Polymer) A. Starch B. Cellulose C. Nucleic acid D. Protein List II (Monomer) I. nucleotide II. α -glucose III. β -glucose IV. α -amino acid Choose the correct answer from the options given below :-$ (1) $A-II, B-I, C-III, D-IV$ (2) $A-IV, B-II, C-I, D-III$ (3) $A-I, B-III, C-IV, D-II$ (4) $A-II, B-III, C-I, D-IV$ 239. $Glucose on prolonged heating with HI gives :$ (1) $Hexanoic acid$ (2) $6-iodohexanal$ (3) $n-Hexane$ (4) $1-Hexene$ 240. $Which of the following acids is a vitamin?$ (1) $Adipic acid$ (2) $Ascorbic acid$ (3) $Saccharic acid$ (4) $Aspartic acid$