Question

Nails and hair are made up of which of the following protein?

• A. Collagen
• B. Keratin
• C. Elastin
• D. Fibrin

Answer 1

The correct option is B Keratin

Many proteins serve as supporting filaments, cables or sheets to give biological structures strength or protection. The major component of tendons and cartilage is the fibrous protein collagen, which has very high tensile strength.

Leather is almost pure collagen. Ligaments contain elastin, a structural protein capable of stretching in two dimensions.

Hair, fingernails, and feathers consist largely of the tough, insoluble protein keratin. The major component of silk fibers and spider webs are fibroin.