Keratin
A)is a protein.
B)is secreted by plasma cells to help protect the body from viruses.
C)is made by melanocytes only.
D)is both a protein and made by melanocytes only.
E)All of these choices are correct.

Question

Quizplus · Accepted Answer

Keratin is a protein that is a major component of hair, nails, and the outer layer of skin. It provides structure, protection, and strength to these structures. It is not secreted by plasma cells, nor is it made by melanocytes exclusively.