Enzymes – Online MCQs Test – Biology 9th

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

2. Activity of enzymes can be enhanced by:

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

4. This enzyme acts on lipids only.

5. The point where the enzyme is most active is known as:

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

7. Reactions of an organism are collectively called:

8. All are characters of enzymes except:

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

10. Reactants of enzyme are called:

11. The metabolic activities are always of:

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

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

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

15. Enzyme are:

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

17. Enzymes are sensitive to a minor change in:

18. The point where the enzyme is most active is known as:

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

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