Enzymes – Online MCQs Test – Biology 9th

1. Its action allows biological reaction to proceed rapidly at relatively low temperature and pressure tolerable by living organism.

2. Rate of reaction will increase when temperature:

3. All enzymes work at their maximum rate at:

4. Enzymes are biocatalyst, made up of mostly:

5. All are factors affecting enzymes activity except:

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

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

8. Enzymes have specific shape with three dimensionally folded chains of:

9. Most enzymes work at neutral pH:

10. Active site continuously changes it shapes until the substrate do not bind to it, is statement of:

11. Reactants of enzyme are called:

12. Reactions of an organism are collectively called:

13. The metabolic activities are always of:

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

15. Enzymes activity occurs within a:

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

17. This enzyme acts on lipids only.

18. All are characters of enzymes except:

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

20. Metabolic reactions are:
(i)Constructive reactions
(ii)Destructive reactions
(iii)inhibiting reactions