Biomolecules PYQs Set 3 (PDF)

Set 3 of 11 · Questions 61-90 of 309

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Mere Teacher · Previous Year Questions NEET Chemistry · Biomolecules · Set 3 (Q61-90)
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61. $The secondary structure of protein refers to:$ (1) $α-helical backbone.$ (2) $hydrophobic interactions.$ (3) $sequence of α-amino acids.$ (4) $fixed configuration of the polypeptide backbone$ 62. $Type of amino acids obtained by hydrolysis of proteins is :$ (1) $β$ (2) $α$ (3) $δ$ (4) $γ$ 63. $Which base is present in RNA but not in DNA?$ (1) $uracil$ (2) $cytosine$ (3) $guanine$ (4) $thymine$ 64. $Which of the following is correct about H ‐bonding in nucleotide?.$ (1) $A - T, G - C$ (2) $A - G, T - C$ (3) $G - T, A - C$ (4) $A - A, T - T$ 65. $Match List - I with List - II. List - IReaction of Glucose with (A) Hydroxylamine (B) Br_{2} water (C) Excess acetic anhydride (D) Concentrated HNO_{3} List - IIProduct formed (I) Gluconic acid (II) Glucose pentacetate (III) Saccharic acid (IV) Glucoxime Choose the correct answer from the options given below:$ (1) $A-III, B-I, C-IV, D-II$ (2) $A-I, B-III, C-IV, D-II$ (3) $A-IV, B-III, C-II, D-I$ (4) $A-IV, B-I, C-II, D-III$ 66. $The helical structure of protein is stabilised by$ (1) $dipeptide bonds$ (2) $hydrogen bonds$ (3) $ether bonds$ (4) $peptide bonds.$ 67. $Which structure(s) of proteins remain(s) intact during denaturation process? [NEET 2019]$ (1) $Both secondary and tertiary structure$ (2) $Primary structure only$ (3) $Secondary structure only$ (4) $Tertiary structure only$ 68. $A sequence of how many nucleotides in messenger RNA makes a codon for an amino acid?$ (1) $Three$ (2) $Four$ (3) $One$ (4) $Two$ 69. $Which of the following statements is not correct?$ (1) $Ovalbumin is a simple food reserve in egg‐white.$ (2) $Blood proteins thrombin and fibrinogen are involved in blood clotting.$ (3) $Denaturation makes the proteins more active.$ (4) $Insulin maintains sugar level in the blood of a human body.$ 70. $Which of the following gives positive Fehling solution test?$ (1) $Sucrose$ (2) $Glucose$ (3) $Fats$ (4) $Protein$ 71. $Which of the following molecules form a zwitter ion?$ (1) $CH_{3} COOCH_{3}$ (2) $H_{2} NCH_{2} COOH$ (3) $CH_{3} COC_{2} H_{5}$ (4) $CH_{3} CH_{2} COOH$ 72. $Thiamine and pyridoxine are also known respectively as:$ (1) $Vitamin β_{2} and Vitamin E$ (2) $Vitamin E and Vitamin B_{2}$ (3) $Vitamin B_{6} and Vitamin B_{2}$ (4) $Vitamin B_{1} and Vitamin B_{6}$ 73. $Match the following: List I i) Riboflavin ii) Thiamine iii) Pyridoxine iv) Ascorbic acid List II p) Beri beri q) Scurvy r) Cheilosis s) Convulsions$ (1) $i \to s, ii \toq, iii \to p, iv \tor$ (2) $i \to p, ii \to s, iii \to r, iv \to q$ (3) $i \to r, ii \to s, iii \to p, iv \to q$ (4) $i \to r, ii \to p, iii \to s, iv \to q$ 74. $Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A) : Ketoses give Seliwanoff’s test faster than Aldoses. Reason (R) : Ketoses undergo β -elimination followed by formation of furfural choose the correct answer from the options given below :$ (1) $(A) is false but (R) is true$ (2) $Both (A) and (R) are true and (R) is the correct explanation of (A)$ (3) $(A) is true but (R) is false$ (4) $Both (A) and (R) are true but (R) is not the correct explanation of (A)$ 75. $Sugar which does not give reddish brown precipitate with Fehling's reagent is:$ (1) $Sucrose$ (2) $Lactose$ (3) $Glucose$ (4) $Maltose$ 76. $The couplings between base units of DNA is through$ (1) $hydrogen bonding$ (2) $electrostatic bonding$ (3) $covalent bonding$ (4) $van der Waals forces.$ 77. $Which of the following tests cannot be used for indentifying amino acids ?$ (1) $Biuret test$ (2) $Barfoed test$ (3) $Ninhydrin test$ (4) $Xanthoprotetic test$ 78. $The source of vitamin, whose deficiency causes scurvy is$ (1) $Amla$ (2) $Carrot$ (3) $Egg$ (4) $Fish$ 79. $Which one of the following is a peptide hormone?$ (1) $Adrenaline$ (2) $Glucagon$ (3) $Testosterone$ (4) $Thyroxine$ 80. $Which of the following gives a positive test with ninhydrin?$ (1) $Starch$ (2) $Egg albumin$ (3) $Polyvinyl chloride$ (4) $Cellulose$ 81. $Fat soluble vitamins are: (A) Vitamin B_{1} (B) Vitamin C(C) Vitamin E (D) Vitamin B_{12} (E) Vitamin K Choose the correct answer from the options given below:$ (1) $B & C Only$ (2) $C & D Only$ (3) $C & E Only$ (4) $A & B Only$ 82. $Which structure of protein remains intact after coagulation of egg white on boiling?$ (1) $Primary$ (2) $Tertiary$ (3) $Secondary$ (4) $Quaternary$ 83. $Deficiency of which vitamin causes degeneration of spinal cord?$ (1) $E$ (2) $K$ (3) $B_{12}$ (4) $A$ 84. $Which one of the following tests used for the identification of functional groups in organic compounds doesnot use copper reagent?$ (1) $Barfoed's test$ (2) $Seliwanoff's test$ (3) $Benedict's test$ (4) $Biuret test for peptide bond$ 85. $The amino acid which is basic in nature is$ (1) $histidine$ (2) $tyrosine$ (3) $proline$ (4) $valine.$ 86. $Which of the following statements is not true about RNA ?$ (1) $It controls the synthesis of protein$ (2) $It has always double stranded α - helix structure.$ (3) $It usually does not replicate.$ (4) $It is present in the nucleus of the cell.$ 87. $Match List I with List II. List I Enzyme A. Invertase B. Zymase C. Diastase D. Maltase List II Conversion of I. Starch into maltose II Maltose into glucose III. Glucose into ethanol IV. Cane sugar into glucose Choose the most appropriate answer from the options given below :$ (1) $A-III,B-IV.C-II.D-I$ (2) $A-III. B-II. C-I. D-IV$ (3) $A-IV, B-IIL C-I. D-II$ (4) $A-IV, B-II. C-III. D-I$ 88. $Compound A gives D-Galactose and D-Glucose on hydrolysis. The compound A is :$ (1) $Amylose$ (2) $Sucrose$ (3) $Maltose$ (4) $Lactose$ 89. $The α -Helix and β - Pleated sheet structures of protein are associated with its:$ (1) $tertiary structure$ (2) $quaternary structure$ (3) $secondary structure$ (4) $primary structure$ 90. $Match List I and List II List I Test (A) Molisch’s Test (B) Biuret Test (C) Carbylamine Test (D) Schiffs Test List II Functional group / Class of Compound (I) Peptide (II) Carbohydrate (III) Primary amine (IV) Aldehyde Choose the correct answer from the options given below:$ (1) $(A) -I, (B) - II, (C) - III, (D) - IV$ (2) $(A) - III, (B) - IV, (C) -I, (D) - II$ (3) $(A) - II, (B) -I, (C) - III, (D) - IV$ (4) $(A) - III, (B) - IV, (C) -II, (D) -I$