Each enzyme has an optimum pH at which it attains its maximum activity.
That optimum pH varies for each enzyme. The optimum range for pepsin is 1.5-2; for stomach lipase it is 4.0-5.0. Any change below
above the optimum pH range for a specific enzyme results in a decrease in enzyme action.
Which graph best represents the pH and enzyme action for lipase?
x
A
B
Reaction velocity
Reaction velocity