Question

Gastric juice of infants contains:

• A. Pepsinogen, lipase, rennin
• B. Amylase, rennin, pepsinogen
• C. Maltase, Pepsinogen and rennin
• D. Nuclease, pepsinogen, lipase

Answer 1

The correct option is A Pepsinogen, lipase, rennin

The secretion of the cells of the gastric glands form gastric juice with pH 2 to 3.7. It contains two proenzymes, pepsinogen and prorennin and enzyme gastric lipase, mucous and hydrochloric acid. Rennin (chymosin) is responsible for clotting milk by acting on soluble milk protein caseinogen, and converting it into insoluble casein. This ensures that milk remains in stomach long enough to be acted on by protein digesting enzymes. Rennin's concentration is highest in young mammals (as their primary diet is milk) which reduces gradually with age.