Question

Rennin acts on

(a) milk changing casein into calcium paracaseinate at 7.2 - 8.2 pH

(b) protein in stomach

(c) fat in intestine

(d) milk changing casein into calcium paracaseinate at 1-3 pH

Answer 1

Correct Option (d) milk changing casein into calcium paracaseinate at 1-3 pH

Explanation:

Stomach secretes gastric juice pH [1-3.5] which contains prorennin secreted by the zymogen cells. Inactive prorennin is converted into rennin by HCl. Rennin acts on casein, a protein milk changing it into calcium paracaseinate, it is known as curdling of milk.