Enzymes – Online MCQs Test – Biology 9th

1. Enzymes activity occurs within a:

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

3. All are factors affecting enzymes activity except:

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

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

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

7. All enzymes work at their maximum rate at:

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

9. Enzymes are biocatalyst, made up of mostly:

10. If the amount of the enzyme is kept constant and the substrate concentration is then gradually increased, the reaction velocity will:

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

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

13. It works at a high pH i.e. it is basic.

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

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

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

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

18. Reactants of enzyme are called:

19. The metabolic activities are always of:

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