Which of the following statements is not true for plasma membrane

Options

A. It is present in both plant and animal cell
B. Lipid is present as a bilayer in it
C. Proteins are presently integrated as well as loosely associated with the lipid bilayer
D. Carbohydrate is never found in it

Answer

D

Explanation

Chemically a biomembrane consist of lipids (20 – 79%), protein (20 – 70%), carbohydrates (1 – 5%) and water (20%). The ratio of protein and lipid varies in different membranes. Carbohydrates present in the membrane are branched or unbranched oligosaccharides eg hexose, fucose, hexosamine, sialic acid etc.