Question 1

Which of the following statements is/are true?

Intermolecular forces of attraction in nylons are dipole-dipole interactions.
Vulcanization introduces hydrogen bondings between polymer chains.
Dacron is a polyamide.
Gutta percha and natural rubber are stereoisomers.
Polypropylene, because of the presence of several chiral atoms is optically active.

Answer

Correct Option: D

Question 2

Assertion: Allergy is caused by histamines. Reason: Antibodies are Y-shaped protein molecules.

Both A and R are true and R is the correct explanation of A.
Both A and R are true but R is NOT the correct explanation of A.
A is true but R is false.
A is false but R is true.
Both A and R are false.

Answer

Correct Option: B

Question 3

Assertion: Anaerobic degradation of glucose is called glycolysis. Reason: The ultimate products of glycolysis are CO₂ and H₂O.

Both A and R are true and R is the correct explanation of A.
Both A and R are true but R is NOT the correct explanation of A.
A is true but R is false.
A is false but R is true.
Both A and R are false.

Answer

Correct Option: C

Question 4

Assertion: Cellulose is not digested by humans. Reason: Cellulose is a branched polymer of high molecular weight.

Both A and R are true and R is the correct explanation of A.
Both A and R are true but R is NOT the correct explanation of A.
A is true but R is false.
A is false but R is true.
Both A and R are false.

Answer

Correct Option: C

Question 5

Two hexoses were found to give the same osazone. Which one of the following statements is correct with respect to their structural relationship? A. The carbon atoms 1 and 2 in both have the same configuration. B. They are epimeric at C₃. C. The carbon atoms 3, 4 and 5 in both have the same configuration.

Only A
Only B
Only C
Both A and B
A, B, and C

Answer

Correct Option: C

Question 6

Assertion: A, B, AB and O are the blood groups. Reason: The pH of the human blood is maintained between 7.36-7.42 by the action of blood buffers.

Both A and R are true and R is the correct explanation of A.
Both A and R are true but R is NOT the correct explanation of A.
A is true but R is false.
A is false but R is true.
Both A and R are false.

Answer

Correct Option: B

Question 7

Assertion: Treatment of D-glucose with dilute alkali affords an equilibrium mixture consisting of D-mannose, D-fructose and starting substance D-glucose. Reason: The reaction involves an intermediate in which hybridization of C₂ changes from sp³ to sp².

Both A and R are true and R is the correct explanation of A.
Both A and R are true but R is NOT the correct explanation of A.
A is true but R is false.
A is false but R is true.
Both A and R are false.

Answer

Correct Option: A

Question 8

Assertion: Glucose and fructose give the same osazone. Reason: During osazone formation, stereochemistry at C₁ and C₂ is destroyed.

Both A and R are true and R is the correct explanation of A.
Both A and R are true but R is NOT the correct explanation of A.
A is true but R is false.
A is false but R is true.
Both A and R are false.

Answer

Correct Option: A

Question 9

Which of the the following statements about sucrose is/are correct?

It is an α-D-glycoside.
It undergoes mutarotation.
It does not have a free aldehydic or ketonic group.
Invert sugar, obtained by the hydrolysis of sucrose by enzyme, has negative rotation.

1, 2, and 3
1, 3, and 4
2, 3, and 4
1, 2, and 4
All are correct

Answer

Correct Option: B

Question 10

Which of the following statements is true?

Denatured involves changes in the primary structure of proteins.
Respiration involves conversion of bigger molecules into smaller molecules.
The blood platelets act as defence against infections.
Cancer is a congenital disease.
At isoelectric point, an α-amino acid has the minimum solubility.

Answer

Correct Option: E

Question 11

Which of the following statements is/are true? A. Antibodies are formed in the body only on demand. B. All DNA and RNA molecules contain adenine, guanine and cytocine. C. Casein, the milk protein has phosphate groups as prosthetic groups.

Both A and B
Both A and C
B and C
A, B, and C
None of these

Answer

Correct Option: D

Question 12

Which of the following statements is/are not correct?

Presence of antigens in the blood is not necessary for the production of antibodies.
Yeast cells derived their energy from glucose by glycolysis.
Starch acts as a nutrient but cellulose does not.
Vitamin B₁₂ does not occur in plants.
All of correct

Answer

Correct Option: A

Question 13

Match the entries in column A with those in column B from the combinations shown.


Column A	Column B
a. Lysergic acid diethylamide	i. A sweet protein
b. Sodium lauryl sulphate	ii. Hallucinogen
c. Urethane	iii. Poly trans-isoprene
d. Monallelin	iv. Detergent
e. Gutta percha	v. Esters of H₂NCOOH

a - ii, b - iv, c - v, d - i, e - iii
a - iv, b - v, c - iii, d - i, e - ii
a - iv, b - v, c - iii, d - ii, e - i
a - ii, b - iii, c - v, d - i, e - iv
a - i, b - iv, c - ii, d - v, e - iii

Answer

Correct Option: A

Question 14

Which of the following statements is/are false?

Natural rubber is a chain growth polymer.
Bakelite is prepared by copolymerization of phenol with formaldehyde.
Polyvinyl acetate is a thermoplastic.
Caprolactam is obtained by Beckmann rearrangement of acetophenone oxime.
Bubble gum contains styrene-butadiene rubber.

Answer

Correct Option: D

Question 15

Assertion: Human body can synthesize vitamins. Reason: Vitamins are required in small amounts for life growth and health of human beings.

Both A and R are true and R is the correct explanation of A.
Both A and R are true but R is NOT the correct explanation of A.
A is true but R is false.
A is false but R is true.
Both A and R are false.

Answer

Correct Option: D

Description: GATE. ENGINEERING, CSIR NET
Number of Questions: 15
Created by: Tanya Dwivedi
Tags: GATE PVC and Polyester Synthetic Fibers Glycolysis Vitamins Antigen-antibody Reaction Lipids and Carbohydrates Circulatory System Proteins

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