Question

Study the following statements regarding lactic acid bacteria (LAB) which are used to convert milk into curd.
(i) They produce adds that coagulate and partially digest the milk proteins.
(ii) A small amount of curd added to the fresh milk as an inoculum contains millions of LAB, which at suitable temperature, multiply and convert milk into curd.
(iii) Conversion of milk into curd improves its nutritional quality by increasing vitamin $B_{12}$.
(iv) LAB may result in acidity in the stomach of human beings.
Which of the given statements are correct?

• A. (i) and (ii)
• B. (ii) and (iii)
• C. (i), (ii) and (iii)
• D. (i), (ii), (iii) and (iv)

Answer 1

The correct option is C (i), (ii) and (iii)

Microbes such as. Lactobacillus and others commonly called lactic acid bacteria (LAB) grow in milk and convert it into curd. During growth, such bacteria produce adds (mainly lactic add) that coagulate and partially digest the milk proteins. A small amount of curd, known as starter, is added to the milk and kept at a suitable temperature, where lactic acid bacteria multiply in millions and converts milk into curd that also improves its nutritional quality by increasing vitamin BI2. It also checks the growth of disease-causing microbes in the stomach.

So, the correct answer is '(i), (ii) and (iii)'