A) below 3
B) below 2
C) above 5
D) above 3
Correct Answer: C
Solution :
Pepsin is inactivated at pH above 5. Pepsin is a proteolytic or protein splitting enzyme. The pH optimum of pepsin is about 2 and the enzyme, therefore, works well in the acidic gastric juice while it is inactivated in the basic medium.
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