300+ TOP MCQs on Enzyme and Answers

NEET Biology is the vey important paper in the medical entrance exam. Here, you will discover the NEET Biology MCQs and Answers for all Concepts as per the latest syllabus. Practice more on a regular basis with these NEET Biology objective questions on air pollution . NEET Biology Enzyme Multiple Choice Questions

MCQs on Enzyme :

1. The nature of an enzyme is
(a) Lipid
(b) Vitamin
(c) Carbohydrate
(d) Protein

Answer

Answer: (d)

2. In alcoholism, this enzyme is elevated
(a) acid phosphatase
(b) hepatitis
(c) serum glutamate pyruvate transaminase
(d) glutamyl transpeptidase

Answer

Answer: (d)

3. With regards to enzyme action, this statement is incorrect
(a) Malonate is a competitive inhibitor of succinic dehydrogenase
(b) the substrate binds with the enzyme at its active site
(c) the non-competitve inhibitor binds the enzyme at a site distinct from that binding the substrate
(d) addition of a lot of succinates does not reverse the inhibition of succinic dehydrogenase by malonate

Answer

Answer: (d)

4. What is the count of genes that determine the synthesis of one enzyme?
(a) One
(b) Four
(c) Eight
(d) Sixteen

Answer

Answer: (a)

5. This enzyme was first isolated and purified in the form of crystals
(a) Urease
(b) pepsin
(c) Amylase
(d) Ribonuclease

Answer

Answer: (a)

6. Macromolecule chitin is
(a) a simple polysaccharide
(b) sulphur containing polysaccharide
(c) phosphorous containing polysaccharide
(d) nitrogen containing polysaccharide

Answer

Answer: (d)

7. Enzyme-driven metabolic pathways can be made more efficient by
(a) grouping enzymes into multienzyme free-floating complexes
(b) concentrating enzymes with specific cellular compartments
(c) fixing enzymes into membranes so they are adjacent to each other
(d) all of these

Answer

Answer: (d)

8. Tryptophan synthetase of E.coli, a typical bifunctional oligomeric enzyme consists of
(a) a protein A and one subunit A
(b) a protein designated A
(c) two proteins designated A and B
(d) a protein designated B

Answer

Answer: (c)

9. This statement about enzymes is true
(a) enzymes accelerate reactions by lowering the activation energy
(b) enzymes are proteins whose three-dimensional form is key to their function
(c) enzymes do not alter the overall change in free energy for a reaction
(d) all of these

Answer

Answer: (d)

10. The enzyme COX-1 is vital for human health in this way:
(a) it is a chemical derivative of aspirin
(b) catalyzes the hormone-production which maintains the stomach lining
(c) critical for the biosynthesis of DNA
(d) helps in the transportation of carbon dioxide in the blood

Answer

Answer: (b)

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