Enzymology MCQs

By: Prof. Dr. Fazal Rehman | Last updated: May 14, 2025

1. : We use enzyme papain to …
(A) tenderize meat
(B) increase production
(C) leaven the meat
(D) none of these

2. : Digestive enzyme belongs to which class?
(A) hydrolases
(B) ligases
(C) lipases
(D) acetylases

3. : Apoenzymes are synthesized in …
(A) active form
(B) inactive form
(C) pro-active form
(D) all of these

4. : The chemical nature of the enzyme is …
(A) DNA
(B) RNA
(C) nucleic acid
(D) protein

5. : “Ki” shows
(A) competitive inhibition
(B) denaturation
(C) reaction velocity
(D) none of these

6. : Which of the following resembles the competitive inhibitor malonic acid?
(A) succinic acid
(B) fumaric acid
(C) malic acid
(D) none of these

7. : The active site of enzyme remain …
(A) rigid
(B) globular
(C) rough
(D) none of these

8. : Iodine is …
(A) uncompetitive enzyme inhibitor
(B) specific enzyme inhibitor
(C) enzyme regulator
(D) none of these

9. : Which of the following is not a substrate specific enzyme?
(A) fructokinase
(B) glucokinase
(C) hexokinase
(D) none of these

10. : Which of the enzyme participate as a coenzyme when pyruvate is converted to oxaloacetate?
(A) biotin
(B) NAD+
(C) ATP++
(D) NAD

11. : The coenzyme is basically a …
(A) protein
(B) carbohydrate
(C) vitamin
(D) none of these

12. : Which of the following enzyme joins the ends of two strands of nucleic acid?
(A) ligase
(B) protease
(C) lipase
(D) hydrolase