Question

Curd, cheese and butter are produced with the use of

• A. Yeast
• B. $Penicillium$
• C. Streptococcus
• D. None of the above

Answer 1

The correct option is D None of the above

Formation of curd :
$Lactobacillus$, a lactic acid bacteria, is used for the conversion of milk into curd. It acts on the lactose present in the milk, producing lactic acid. The lactic acid reduces the pH of the milk, resulting in the coagulation of the milk proteins, forming curd.

Formation of cheese :
The process of cheese making involves the following steps:-

• Souring of the milk (with the help of lactic acid bacteria and the addition of rennet)
• Separation of whey from the formed cheese-curd
• Ripening: The process of maturation of cheese where distinct flavour, taste, texture, body is formed by the use of specific microbes.

Formation of butter :
The pasteurised milk has to be continuously stirred making the fat component of milk to be dispersed, thus forming butter.