Enzymes – Online MCQs Test – Biology 9th

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

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

3. Activity of enzymes can be enhanced by:

4. Enzymes are biocatalyst, made up of mostly:

5. Rate of reaction will increase when temperature:

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

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

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

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

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

11. Enzyme are:

12. Select the mismatched:

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

14. Reactions of an organism are collectively called:

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

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

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

18. All are factors affecting enzymes activity except:

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

20. The metabolic activities are always of:

21. Reactants of enzyme are called:

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

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

24. Enzymes are sensitive to a minor change in:

25. All are characters of enzymes except: