deepak saw that when her mother added some curd to luke warm milk ,then the milk gets converted into curd next day.why does this happen options 1. due to increase of lactobacilli 2.due to decrease of lactobacilli 3.due to increase in pasteurization 4.due to formation of penicillin
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The correct answer is (1) Due to the increase of lactobacilli.
Explanation:
- Curd is made of several kinds of bacteria, like lactobacilli.
- This bacteria changes the special sugar present in milk to lactic acid. The milk turns sour and then the milk protein coagulates to form curd.
- At a low temperature and in a dark place, the bacteria divide quickly.
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