Question

1. keratin and silk are examples of:

(1 point) *

a) globular proteins
b) transport proteins
c) enzymes
d) fibrous proteins

Explanation:

Fibrous proteins have elongated structures and are often structural proteins. Keratin (in hair, nails etc.) and silk (fibroin in silk) are fibrous. Globular proteins are more spherical (e.g., enzymes like amylase). Transport proteins (e.g., hemoglobin) carry substances. Enzymes (e.g., lipase) catalyze reactions.

Answer:

d) Fibrous proteins