The given graph shows the effect of pH on the activity of four different enzymes (P, Q, R and S), Which of the following correctly identifies enzyme found in the stomach, small intestine and one not affected by pH?

Answer

D

Explanation

According to the given graph, enzyme P is unaffected by the pH, enzyme Q is most active at pH of 2 therefore it could be pepsin found in stomach and enzyme S is most active at pH of 8 therefore it could be trypsin that is active at an alkaline pH in the small intestine.