Enzymes – Online MCQs Test – Biology 9th

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

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

3. This enzyme acts on lipids only.

4. Rate of reaction will increase when temperature:

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

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

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

8. Most enzymes work at neutral pH:

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

10. The biocatalysts which facilitate chemical reaction by lowering activation energy is called:

11. Select the mismatched:

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

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

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

15. Activity of enzymes can be enhanced by:

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

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

18. All are factors affecting enzymes activity except:

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

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