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Question

Which acid produced by bacteria makes the milk thicker during curd formation?


A

Lactic acid

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B

Hydrochloric acid

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C

Acetic acid

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D

Carboxylic acid

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Solution

The correct option is A

Lactic acid


Lactobacilli promote the formation of curd from milk. When a small amount of curd is added to warm milk, the lactobacilli start growing in the milk and use lactose, the milk sugar. As an end product, lactic acid is produced which makes the milk thicker and finally converts it into curd.


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