Which of the following proteins is structurally fibrous, heavily cross-linked, and generally insolub — Biomolecules Chemistry Question

💡 Solution & Explanation

Fibrous proteins like keratin (found in hair, nails) and myosin (in muscles) consist of long, parallel polypeptide chains heavily cross-linked by hydrogen and disulfide bonds. This rigid, tightly packed structure renders them highly insoluble in aqueous solutions.