Question

9. Deepak saw that when her mother added
some curd to luke warm milk, then milk gets
converted into the curd next day. Why does this
happen?
(a) Due to increase of Lactobacilli
(b) Due to decrease of Lactobacilli
(c) Due to increase in pasteurization
(d) Due to formation of Penicillin​

Answer 1

Answer:

a

because the lactobacillus will increase in the milk

Answer 2

Answer:

(a) Due to an increase in Lactobacilli

Explanation:

There are species of Lactobacillus involved in curd formation, majorly Lactobacillus delbrueckii. The starter is added to the lukewarm milk which contains a small number of bacteria. Later, the number of these bacteria increases and ferments the lactose sugar to lactic acid. The acidity increases by lactic acid and results in the coagulation of casein protein. Hence, curd formed.

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