_______ is a fibrous protein that is responsible for providing strength and water resistance to the skin surface.
A
Keratin
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B
Collagen
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C
Elastin
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D
Biotin
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Solution
The correct option is A Keratin Keratin is an important protein present in the epidermis which provides strength and water resistance to the skin. It is a major component of skin derivatives like hair, horns and hooves in animals. It is a dead tissue.