Question

What is the role of acid in our stomach?

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Answer 1

Answer:

The hydrochloric acid in the gastric juice breaks down the food and the digestive enzymes split up the proteins. The acidic gastric juice also kills bacteria. The mucus covers the stomach wall with a protective coating.

Answer 2

(i) It makes the medium inside the stomach acidic, that is necessary for the activation of enzyme pepsin. It converts inactive propepsin into active pepsin.

(ii) Hydrochloric acid kills the bacteria, which may enter the stomach along with food.