Question

How is the lactic acid fermentation used in milk industry?

• A. To convert milk sugar to lactic acid
• B. Lactic acid coagulate the milk protein casein
• C. Lactic acid coagulate the milk fats
• D. All of the these

Answer 1

The correct option is A To convert milk sugar to lactic acid

• Lactobacillus bacteria cause the fermentation of milk in which milk sugar lactose is converted into lactic acid. This produces yoghurt and curd.
  
• Lactobacillus is acidophiles that best grow at a pH of 1 to 5.4.
• Thus the correct answer is option A.