Nails, horns and hoofs contain

Chitin

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Keratin

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Both A and B

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None of the above

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Solution

The correct option is B Keratin
Proteins have a number of structural and functional role in living organisms. Some of the important structural proteins are elastin, collagen, tubulin, keratin etc. Keratin is found in hair, skin, beak, feathers, claws, hooves, horns and nails of animals.

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