NEET BIOLOGY

Detailed explanation-1: -Keratin is a fibrous protein which can be classified into two groups: soft keratin and hard keratin. It forms the bulk of cytoplasmic epithelia and epidermal structures. Keratin is abundant in animal hair, nails, wool, horns, and other features [8]. It may present in two conformations, -helix and -sheet.

Detailed explanation-2: -keratin, fibrous structural protein of hair, nails, horn, hoofs, wool, feathers, and of the epithelial cells in the outermost layers of the skin. Keratin serves important structural and protective functions, particularly in the epithelium.

Detailed explanation-3: -Examples of fibrous proteins are -keratin, the major component of hair and nails, and collagen, the major protein component of tendons, skin, bones, and teeth.

Detailed explanation-4: -Keratinocytes (ker-uh-TIH-no-sites) make keratin, a type of protein that’s a basic component of hair, skin, and nails. Keratin in the skin’s outer layer helps create a protective barrier.

Detailed explanation-5: -Alpha Keratin is found in hair, wool, horn, and tails. The consensus amino acid sequence is a repeating heptamer of (-a-b-c-d-e-f-g-)n where residues a and d are non-polar. The two alpha helicies coil, rather than form a ladder, because each alpha helix turns 700 degrees each (-a-b-c-d-e-f-g-)n repeat.