Digestion and Absorption Question 60
60. Renin acts on
[1994]
(a) milk changing casein into calcium paracaseinate at $7.2-8.2 pH$
(b) proteins in stomach
(c) fat in intestine
(d) milk changing casein into calcium paracaseinate at $1-3 pH$.
Show Answer
Answer : d
Hints & Solution
(d) Renin acts on milk protein casein & changes it into paracasein spontaneously precipitating into insoluble calcium paracaseinate, forming solid curd or coagulated milk. Renin is present in the gastric juice and hence works in highly acidic $pH$ (due to $HCl$ ) in stomach (about 1-3 pH) and is absent in adult human being.
