What is the optimal pH for pepsin activity?

What is the optimal pH for pepsin activity?

  • pH 1.5-3.5
  • pH 6-7
  • pH 7-8
  • pH 8-9
The correct option is: pH 1.5-3.5
Pepsin works best at a pH of 1.5-3.5, which is the normal acidic environment of the stomach. This low pH is maintained by hydrochloric acid.
Tags: enzymespHdigestionbiology