State the functions of endoplasmic reticulum.

Explanation

Functions or ER : (i) ER provides an ultra-structural, skeletal framework to the cells and gives support to the colloidal cytoplasmic matrix. (ii) ER helps in the rapid intercellular transport of the materials. (iii) RER offers extensive surface area for the synthesis of protein on the ribosomes. (iv) SER helps in the synthesis of fats in the cells of adipose tissue.