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Question

____(A)______is milk sugar and it is a ____(B)____.

A
A-Casein, B-polysaccharide
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B
A-Lactose, B-monosaccharide
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C
A-Lactose, B-disaccharide
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D
A-Rennin, B-disaccharide
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Solution

The correct option is C A-Lactose, B-disaccharide
Milk is highly nutritious. It contains fat globules, proteins, sugars, minerals and several other substances.

The sugar present in the milk is lactose and it is a disaccharide (carbohydrate). Lactose is made up of two units, glucose and galactose. These two units are linked by a glycosidic bond.

The protein present in the milk is casein. Rennin is a protein digesting enzyme found in animals like cows. It converts the soluble caseinogen into insoluble casein. It causes the curdling of milk. This enzyme is used during the process of cheese making.

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