give the chemical composition of plasma membrane and cell wall.
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PLASMA MEMBRANE
The membrane is mainly composed of lipids, proteins and carbohydrates. ... Robertson (1959) proposed that plasma membrane is three-layered structure where proteins form the outer and inner layers of membrane that encloses lipids to form a unit membrane.
CELL WALL
Chemically the cell wall of the plant cell is composed of a variety of polysaccharides, lipids, proteins and mineral deposits. In most of the plant cells, the cell wall is made up of cellulose, hemicellulose, pectin and protein.
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