Which of the Following is a Functional Protein

Question

Which of the following is a functional protein?
A) collagen
B) keratin
C) enzymes
D) both A and B

Accepted Answer

Enzymes are functional proteins because they catalyze chemical reactions in the body, facilitating life processes. Collagen and keratin are structural proteins that provide support and strength to tissues such as skin, hair, and nails, but they do not perform enzymatic functions.