A) 11
B) 5-6
C) 1.6-2.4
D) 4-7
Correct Answer: C
Solution :
Pepsin is a protease enzyme that functions in acidic environment of stomach having pH of about 1.5-2. It exhibits maximal activity at pH 2.0 and is inactive at pH 6.5 and above. However, pepsin is not fully denatured or irreversibly inactivated until pH 8.0 is reached.
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