Question

The initial step in the digestion of milk in humans is carried out by

• A. lipase
• B. pepsin
• C. rennin
• D. trypsin

Answer 1

The correct option is C rennin

Rennin is a protein digesting enzyme secreted by the peptic cells present in epithelium of gastric glands. It converts milk protein casein into paracasein, leading to milk coagulation. It is found in calves. Rennin is also present in small amounts in human infants but not in adults. In adults, the enzyme pepsin is responsible for digestion of milk.