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. Rate of reaction will increase when temperature:

4. The metabolic activities are always of:

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

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

7. All enzymes work at their maximum rate at:

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

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

10. All are characters of enzymes except:

11. Activity of enzymes can be enhanced by:

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

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

14. This enzyme acts on lipids only.

15. These are the enzymes which catalyzes the proteins.

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

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

18. Enzymes are biocatalyst, made up of mostly:

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

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