Enzymes – Online MCQs Test – Biology 9th

1. Enzymes are biocatalyst, made up of mostly:

2. All are factors affecting enzymes activity except:

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

4. All are characters of enzymes except:

5. Rate of reaction will increase when temperature:

6. Activity of enzymes can be enhanced by:

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

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

9. Reactions of an organism are collectively called:

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

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

12. Reactants of enzyme are called:

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

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

15. Enzymes are sensitive to a minor change in:

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

17. Select the mismatched:

18. The metabolic activities are always of:

19. Enzyme are:

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

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

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

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

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

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