BIOMOLECULES AND ENZYMES

Detailed explanation-1: -Keratin is the major structural fibrous protein to form hair, wool, feathers, nails, and horns of many kinds of animals, and has a high concentration of cysteine, 7 to 20% of the total amino acid residues, that form inter-and intra-molecular disulfide bonds (Dowling et al., 1986).

Detailed explanation-2: -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-3: -Enzymes Are Powerful and Highly Specific Catalysts This is the case for the large and very important class of proteins called enzymes. As described in Chapter 2, enzymes are remarkable molecules that determine all the chemical transformations that make and break covalent bonds in cells.

Detailed explanation-4: -These proteins provide structure and support for cells. On a larger scale, they also allow the body to move. These proteins bind and carry atoms and small molecules within cells and throughout the body.

Detailed explanation-5: -Actin filaments (red) and microtubules (green) are two different kinds of proteins that provide structure to cells.