Multiple choice general knowledge

Nails are made up of which protein?

  1. prion

  2. Gelatin

  3. Glutin

  4. Keratin
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Nails are primarily composed of keratin, a tough fibrous protein that also forms hair and the outer layer of skin. Keratin provides nails with their hardness and protective properties. This is a fundamental fact in human biology.

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