Question

Lactic acid bacteria grow in milk and convert it into curd increasing its nutritional value by increasing

• A. Vitamin B${}_6$
• B. Vitamin B${}_{12}$
• C. Both A and C
• D. Vitamin A

Answer 1

The correct option is B Vitamin B${}_{12}$

Curd formation :
Lactic acid bacteria (LAB) act on the lactose (under anaerobic conditions) present in the milk converting it into lactic acid. This reduces the pH of milk, finally converting it into curd.

Production of vitamin :
LAB also partially digests proteins present in milk, increasing the nutritional value by producing vitamin B${}_{12}$. This is one of the major sources of vitamin B${}_{12}$ for vegetarians.