Enzymes – Online MCQs Test – Biology 9th

1. Rate of reaction will increase when temperature:

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

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

4. Enzymes are biocatalyst, made up of mostly:

5. Select the mismatched:

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

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

8. Enzymes are sensitive to a minor change in:

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

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

11. Reactants of enzyme are called:

12. All are factors affecting enzymes activity except:

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

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

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

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

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

18. Most enzymes work at neutral pH:

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

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