_______ is a Tough Waterproofing Protein Which Fills Most of Each

Question

_______ is a tough waterproofing protein which fills most of each epidermal cell.
A) Collagen
B) Carotene
C) Keratin
D) Melanin

Accepted Answer

Keratin is a tough waterproofing protein found in the epidermal cells of the skin, hair, and nails. Collagen is another protein found in the skin, but it is not involved in waterproofing. Carotene is a pigment found in vegetables and fruits, and it does not have a role in waterproofing the skin. Melanin is a pigment that gives the skin its color and provides some protection against UV radiation, but it is not directly involved in waterproofing.