Cell membranes consist mainly of a

Carbohydrate bilayer and proteins

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Protein bilayer and phospholipids

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Lipid bilayer and proteins

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None of these

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Solution

The correct option is C Lipid bilayer and proteins
In the fluid mosaic model of the cell membrane, proposed by Singer-Nicolson in 1972, the phospholipid bilayer has integrated as well as peripheral proteins embedded in it. The integrated proteins are found on the inside and span across the bilayer, while the peripheral proteins are found at the periphery of the lipid layers.

So, the correct answer is 'lipid bilayer and proteins',

Suggest Corrections

	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