Enzymes – Online MCQs Test – Biology 9th

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

2. All enzymes work at their maximum rate at:

3. Activity of enzymes can be enhanced by:

4. The minimum amount of energy, a reaction requires to initiate, is called:

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

6. Select the mismatched:

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

8. Rate of reaction will increase when temperature:

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

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

11. Most enzymes work at neutral pH:

12. Enzymes activity occurs within a:

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

14. Enzyme are:

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

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

17. Enzymes are biocatalyst, made up of mostly:

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

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

20. All are characters of enzymes except: