Home › Quizzes › CSIR NET Chemistry: Polymers and Biochemistry

CSIR NET Chemistry: Polymers and Biochemistry

Practice questions covering polymer chemistry, carbohydrates, proteins, and biochemical processes for CSIR NET Chemical Sciences examination

15 Questions Published
Play Quiz Practise this topic out loud

Questions

Question 1 Multiple Choice (Single Answer)

Which of the following statements is/are true?

  1. Intermolecular forces of attraction in nylons are dipole-dipole interactions.
  2. Vulcanization introduces hydrogen bondings between polymer chains.
  3. Dacron is a polyamide.
  4. Gutta percha and natural rubber are stereoisomers.
  5. Polypropylene, because of the presence of several chiral atoms is optically active.
Question 2 Multiple Choice (Single Answer)

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

  1. Both A and R are true and R is the correct explanation of A.
  2. Both A and R are true but R is NOT the correct explanation of A.
  3. A is true but R is false.
  4. A is false but R is true.
  5. Both A and R are false.
Question 3 Multiple Choice (Single Answer)

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

  1. Both A and R are true and R is the correct explanation of A.
  2. Both A and R are true but R is NOT the correct explanation of A.
  3. A is true but R is false.
  4. A is false but R is true.
  5. Both A and R are false.
Question 4 Multiple Choice (Single Answer)

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

  1. Both A and R are true and R is the correct explanation of A.
  2. Both A and R are true but R is NOT the correct explanation of A.
  3. A is true but R is false.
  4. A is false but R is true.
  5. Both A and R are false.
Question 5 Multiple Choice (Single Answer)

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.

  1. Only A
  2. Only B
  3. Only C
  4. Both A and B
  5. A, B, and C
Question 6 Multiple Choice (Single Answer)

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.

  1. Both A and R are true and R is the correct explanation of A.
  2. Both A and R are true but R is NOT the correct explanation of A.
  3. A is true but R is false.
  4. A is false but R is true.
  5. Both A and R are false.
Question 7 Multiple Choice (Single Answer)

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.

  1. Both A and R are true and R is the correct explanation of A.
  2. Both A and R are true but R is NOT the correct explanation of A.
  3. A is true but R is false.
  4. A is false but R is true.
  5. Both A and R are false.
Question 8 Multiple Choice (Single Answer)

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

  1. Both A and R are true and R is the correct explanation of A.
  2. Both A and R are true but R is NOT the correct explanation of A.
  3. A is true but R is false.
  4. A is false but R is true.
  5. Both A and R are false.
Question 9 Multiple Choice (Single Answer)

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

  1. It is an α-D-glycoside.
  2. It undergoes mutarotation.
  3. It does not have a free aldehydic or ketonic group.
  4. Invert sugar, obtained by the hydrolysis of sucrose by enzyme, has negative rotation.
  1. 1, 2, and 3
  2. 1, 3, and 4
  3. 2, 3, and 4
  4. 1, 2, and 4
  5. All are correct
Question 10 Multiple Choice (Single Answer)

Which of the following statements is true?

  1. Denatured involves changes in the primary structure of proteins.
  2. Respiration involves conversion of bigger molecules into smaller molecules.
  3. The blood platelets act as defence against infections.
  4. Cancer is a congenital disease.
  5. At isoelectric point, an α-amino acid has the minimum solubility.
Question 11 Multiple Choice (Single Answer)

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.

  1. Both A and B
  2. Both A and C
  3. B and C
  4. A, B, and C
  5. None of these
Question 12 Multiple Choice (Single Answer)

Which of the following statements is/are not correct?

  1. Presence of antigens in the blood is not necessary for the production of antibodies.
  2. Yeast cells derived their energy from glucose by glycolysis.
  3. Starch acts as a nutrient but cellulose does not.
  4. Vitamin B12 does not occur in plants.
  5. All of correct
Question 13 Multiple Choice (Single Answer)

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
  1. a - ii, b - iv, c - v, d - i, e - iii
  2. a - iv, b - v, c - iii, d - i, e - ii
  3. a - iv, b - v, c - iii, d - ii, e - i
  4. a - ii, b - iii, c - v, d - i, e - iv
  5. a - i, b - iv, c - ii, d - v, e - iii
Question 14 Multiple Choice (Single Answer)

Which of the following statements is/are false?

  1. Natural rubber is a chain growth polymer.
  2. Bakelite is prepared by copolymerization of phenol with formaldehyde.
  3. Polyvinyl acetate is a thermoplastic.
  4. Caprolactam is obtained by Beckmann rearrangement of acetophenone oxime.
  5. Bubble gum contains styrene-butadiene rubber.
Question 15 Multiple Choice (Single Answer)

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

  1. Both A and R are true and R is the correct explanation of A.
  2. Both A and R are true but R is NOT the correct explanation of A.
  3. A is true but R is false.
  4. A is false but R is true.
  5. Both A and R are false.
← Back to Quizzes