Question

Curd is easy to digest than milk because

• A. it contains vitamin $B_{12}$
• B. it does not contain proteins
• C. it contains partially digested proteins
• D. it contains lactose

Answer 1

The correct option is C it contains partially digested proteins

Curd is obtained by the fermentation of milk by lactic acid bacteria such as Lactobacillus.These microbes convert the lactose present in the milk, in the absence of oxygen, to form lactic acid.

The lactic acid lowers the pH of milk causing the coagulation and partial digestion of the milk proteins. Thus, curd is formed.

It is easier for the proteolytic (protein digesting) enzymes of our digestive system to break down the partially digested proteins, present in curd. This is what makes curd easily digestible.

The lactic acid bacteria present in curd produces Vitamin $B_{12}$ which enhances its nutritional quality. Vitamin $B_{12}$ is essential for the synthesis of red blood cells in the body.

Most of the lactose in the milk is converted into lactic acid by the lactic acid bacteria during curd formation. Hence, curd has less amount of lactose.
Therefore, the correct answer is 'it contains partially digested proteins'.