Q. The pH value at which pepsin becomes inactive is
A) Below pH 2
B) Below pH 5
C) Above pH 3
D) Above pH 5
Explanation
Pepsin remains active below pH 5 and became inactive at pH 5. Proteins are hydrolysed by pepsin. The optimum pH of pepsin is about 2, so it is more active in acidic medium of gastric juices. However, it remains inactivated in the basic medium, i.e., above pH-7
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.