Which of the Following is a Structural Protein

Question

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

Accepted Answer

Collagen and keratin are both examples of structural proteins, as they provide strength and support to tissues such as skin, hair, and nails. Enzymes, on the other hand, are not structural proteins – they are functional proteins that catalyze chemical reactions.