The plasma membrane is composed of-

Lipids

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Cellulose

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Starch

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Proteins

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Solution

The correct options are
A Lipids
D Proteins
The plasma membrane is the protective envelope of the cell. It is a selectively-permeable membrane and regulates the movement of certain substances in and out of cells. The plasma membrane is composed up of both lipids and proteins. Protein molecules occur at places, both inside and on the outer side of the lipid bilayer.

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What is the plasma membrane composed of? [ 3 MARKS]

	I		II
(p)	Plasma membrane mainly contains	(i)	Hemicellulose
(q)	Middle lamella is mainly composed of	(ii)	Calcium pectate
		(iii)	Proteinaceous filaments
		(iv)	Proteins embedded m phospholipid bilayer

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