Enzymes – Online MCQs Test – Biology 9th

1. In the human body, the number of known enzymes is more than:

2. It works at a low pH i.e. it is highly acidic.

3. Enzyme are:

4. In 1894, the lock and key model theory was first postulated by:

5. The minimum amount of energy, a reaction requires to initiate, is called:

6. The metabolic activities are always of:

7. It works at a high pH i.e. it is basic.

8. A small portion of enzyme where substrate attaches with enzyme is called:

9. By inhibitor, the activity of enzymes can be:

10. Choose the correct statement regarding look and key model.

11. In destructive reactions large molecules breakdown in small molecules to produce energy is called:

12. In 1958, the induced fit model suggested by:

13. Reactions of an organism are collectively called:

14. The protein nature of the enzymes makes them extremely sensitive to:

15. These are the enzymes which catalyzes the proteins.

16. Select the mismatched:

17. In constructive reactions, large molecules are formed to form a structure of cell or body. These reaction are called:

18. All are characters of enzymes except:

19. This enzyme acts on lipids only.

20. Rate of reaction will increase when temperature: