WAEC Biology 2010 Question 29

Question 29

Animal Nutrition

Which of the following pH values is the best for the action of the enzymes — renin and pepsin in the stomach?

  1. A.pH2
  2. B.pH7
  3. C.pH8
  4. D.pH9
Show the answer and explanation

Answer: A (pH2)

Explanation

The stomach is strongly acidic because of hydrochloric acid; pepsin and rennin work best at about pH 2.