Question

What is keratin?Define.

Answer 1

Keratin is a fibrous protein forming the main structural constituent of hair, feathers, hoofs, claws, horns, etc.

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Answer 2

Heya !!

Here is ur ans,

Keratin is one of a family of fibrous structural proteins. It is the key structural material making up hair, horns, claws, hooves, and the outer layer of human skin. Keratin is also the protein that protects epithelial cells from damage or stress.

Hope that helps u!!!