Question

0ne day Shalini put the milk in a container to make curd from it but she forgot to add some material in
the milk. After 6 to 8 hours she found that there was no any change in the milk. Give the answer of
the following questions-
1. Which material should Shalini add in the milk to make curd ?
2. What is the role of this material in curd formation?
3. Name the process of making curd from milk.
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Answer 1

Answer:

1-shalini should add lemon juice in the milk to make curd

2-As lemon contains acid it reacts with milk which is base and thus milk changes to curd

Answer 2

1. Shalini should add a little amount of curd in the milk to make it curd.

2. There is a type of bacteria which is present in the curd, known as the Lactobacillus Bulgaricus.

This bacteria decompose the sugar in the milk and turns those sugar molecules into lactic acid.

The formed lactic acid later performs the fermentation process to convert milk into curd.

3. The whole process of milk to curd transformation is simply known as the 'fermentation'.