Question

The optimum pH for pepsin is

• A. 11
• B. 44687
• C. 1.6-2.4
• D. 44658

Answer 1

Answer: (C)

1.6-2.4

Answer 2

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.