StudentAidUnit 7: Enzymes — Mcqs
9th Class Biology · Unit 7: Enzymes
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Multiple Choice Questions (Exercise)
1.Primarily, all enzymes are;
2.Which best defines an enzyme?
3.What can happen if an enzyme is exposed to temperature that is higher than its optimal temperature?
4.Enzymes are specific in their action because:
5.Prosthetic groups are:
6.How does increasing temperature affect enzyme activity?
7.How does competitive inhibitor affect enzyme action?
8.An enzyme works best at a pH of 7.4. It is placed in an acidic solution with a pH of 4.0. How will this affect the enzyme?
9.What is TRUE according to the induced fit model of enzyme action?
10.What is true about the optimum pH values of the following enzymes of digestive system?
Multiple Choice Questions (Additional)
11.Set of biochemical reactions that occur in living organisms in order to maintain life is called?
12.The biochemical reactions in which larger molecules are synthesized are called:
13.The biochemical reactions in which larger molecules are broken down are called:
14.Which does yield energy?
15.Which does consume energy?
16.Which is true about enzyme?
17.What is true about cofactors?
18.The catalytic region on enzyme recognize and binds the substrate and carries the reaction. This region is called as:
19.If you add more substrate to already occurring enzymatic reaction and it has no effect on the rate of reaction, what is the form given to this situation?
20.The active site of an enzyme:
21.Ionization of amino acids at the active site is affected by?
22.In the presence of enzymes, reactions proceed at a:
23.Which of the following are not changed during the biochemical reactions?
24.Enzymes convert the substrate into different molecules called:
25.Lock and key hypothesis of enzyme action supports that:
26.Which graph shows how temperature affects the rate of an enzyme-controlled reaction?
- a A
- b B
- c C
- d D
27.Change in pH can alter the active site by affecting the:
28.Enzyme pepsin in the stomach has an optimum pH of about:
29.Pepsin enzyme works in:
30.Increase or decrease in temperature beyond the optimum temperature will:
- a Increase the rate of reaction
- b Decrease the rate of reactions
- c Not affect the rate of reaction
- d Denature the enzyme