Below is a graph of enzyme activity as a function of pH. Given the information on this graph, where is pepsin most likely to be found?
A) stomach (pH 2)
B) liver (pH 5)
C) pancreas (pH 7)
D) blood (pH 7.4)
E) small intestine (pH 8)

Question

Below is a graph of enzyme activity as a function of pH. Given the information on this graph, where is pepsin most likely to be found? 
A) stomach (pH 2) 
B) liver (pH 5) 
C) pancreas (pH 7) 
D) blood (pH 7.4) 
E) small intestine (pH 8)

Quizplus · Accepted Answer

Pepsin has the highest activity at a pH of 2, which is the pH found in the stomach. Therefore, pepsin is most likely to be found in the stomach.

Below Is a Graph of Enzyme Activity as a Function