Enzymes – Online MCQs Test – Biology 9th

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

2. The metabolic activities are always of:

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

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

5. Select the mismatched:

6. Enzymes are sensitive to a minor change in:

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

8. Reactants of enzyme are called:

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

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

11. All are factors affecting enzymes activity except:

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

13. All are characters of enzymes except:

14. Rate of reaction will increase when temperature:

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

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

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

18. Reactions of an organism are collectively called:

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

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

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

22. Enzyme are:

23. Activity of enzymes can be enhanced by:

24. Enzymes are biocatalyst, made up of mostly:

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