Enzymes – Online MCQs Test – Biology 9th

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

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

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

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

5. These are the enzymes which catalyzes the proteins.

6. Chemical reaction requires particular conditions to carry down at proper rate, especially:

7. Enzymes are biocatalyst, made up of mostly:

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

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

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

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

12. All enzymes work at their maximum rate at:

13. Rate of reaction will increase when temperature:

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

15. Most enzymes work at neutral pH:

16. Enzymes activity occurs within a:

17. Select the mismatched:

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

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

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