Multiple choice

Milk has a sweet taste of its own due to a certain sugar present in it, whereas curd prepared from milk is sour. This change involves the conversion of

  1. sucrose into succinic acid

  2. glucose into glutamine

  3. fructose into fumaric acid

  4. lactose into lactic acid

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The fermentation of milk into curd is caused by Lactobacillus bacteria. These bacteria convert the milk sugar (lactose) into lactic acid, which gives curd its characteristic sour taste and causes the milk proteins to coagulate.