Q. Of which tissue nails , horns, hairs hooves etc are made of:

A
Keratin
B
Chitin
C
Collagen
D
Melanin
Solution:

Keratin is the type of protein that makes up your hair, skin, and nails. Keratin can also be found in your internal organs and glands. Keratin is a protective protein, less prone to scratching or tearing than other types of cells your body produces.

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