Enzymes – Online MCQs Test – Biology 9th

1. Reactions of an organism are collectively called:

2. Most enzymes work at neutral pH:

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

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

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

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

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

8. Enzymes are sensitive to a minor change in:

9. Select the mismatched:

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

11. Enzyme are:

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

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

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

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

16. All are characters of enzymes except:

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

18. Rate of reaction will increase when temperature:

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

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