Cell : The Unit Of Life

Question
CBSEENBI11003192

Cell membrane in animals is composed mainly of the molecule of

  • lipids

  • proteins

  • lipids and proteins

  • carbohydrates

Solution

C.

lipids and proteins

Major constituents of plasma membranes are Protein(60%) and lipids(40%). The percentage of carbohydrates ranges from 1-10 which are in the form of glycoproteins or glycolipids.

Proteins may be extrinsic(peripheral) and intrinsic(integral) while lipids may be phospholipids, sphingolipids, glycolipids and sterols(eg- cholesterol).

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