Question

Keratin present in hair shows secondary structure known as

• A. parallel $\beta$-sheet
• B. antiparallel $\beta$-sheet
• C. $\alpha$-helix
• D. none of these

Answer 1

Answer: (C)

$\alpha$-helical coiled secondary structure is found in several protein, e.g., keratin, myosin, epidermin, fibrin, etc.