Keratin is the major constituent of

Brain

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Hair and skin

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Blood

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Bones and teeth

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Solution

The correct option is D Hair and skin
Keratin is a fibrous protein. It is tough, non-enzymatic structural protein. It is made up of singly or in groups. It possesses secondary structure and insoluble in water. Hair and nail are made up of keratin. It also provides protection. Thus, the correct answer is B.

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The major function of simple proteins like Keratin and Collagen is _____.

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