Enzymes – Online MCQs Test – Biology 9th

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

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

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

4. If the amount of the enzyme is kept constant and the substrate concentration is then gradually increased, the reaction velocity will:

5. Enzymes activity occurs within a:

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

7. The metabolic activities are always of:

8. Enzymes are biocatalyst, made up of mostly:

9. Enzyme are:

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

11. Activity of enzymes can be enhanced by:

12. Rate of reaction will increase when temperature:

13. The phenomenon of chemical activity in an organism is called:

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

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

16. Reactants of enzyme are called:

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

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

19. All enzymes work at their maximum rate at:

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