The Epidermis of the Vertebrate Integument Contains a Tough,fibrous Protein

Question

The epidermis of the vertebrate integument contains a tough,fibrous protein called
A)sclerotin.
B)keratin.
C)calcitin.
D)dermatin.
E)chitin.

Accepted Answer

The tough, fibrous protein present in the epidermis of the vertebrate integument is keratin, which provides protection and prevents water loss. The other choices (sclerotin, calcitin, dermatin, chitin) are not found in the epidermis of vertebrates.