Write the important roles of the following food components in our body.

(a) Cellulose

(b) Fat

(c) Proteins

(d) Calcium

(e) Phosphorus

(a) Cellulose provide roughage for proper functioning of gut.

(b) Fat provides energy and helps to repair tissues.

(c) Protein builds as well as repairs cells and tissues.

(d) Calcium is constituent of bones and enamel. It is required for muscle contraction and clotting of blood.

(e) Phosphorus participates in synthesis of nucleic acid, ATP, NADP, bones, enamel. It helps in muscle contraction and conduction of nerve impulse.