Tag: nutritious food

Casein is protein which form the part of food for the young animal. Best source of casein is milk.

The anhydrobonds of protein are called peptide bonds. A peptide bond is formed between carboxyl group of one amino acid and amino group of adjacent.

Since proteins form components of cytoplasm, therefore it is responsible for growth and repair.

Collagen is the most abundant extracellular protein which with ageing becomes less permeable, less flexible and insoluble. These changes interfere the normal functioning of the cells (decreased inflow of nutritive substances and oxygen into cells and also decreased loss of nitrogenous waste and $CO _{2}$ from the body cells) and induce ageing.