Describe the fluid mosaicmodel of plasma membrane.Write function of plasma membrane. Brainly
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Answer:
The structure of plasma membrane was proposed by Singer and Nicolson in 1972. It is widely accepted as fluid mosaic model. According to this model-
Cell membrane is composed of a lipid bilayer, with a polar head towards the outer side, and hydrophobic tails towards the inner side. So, the non-polar, hydrophobic tail is protected from aqueous environment.
Proteins and carbohydrates are also present in the membrane.
Membrane proteins can be integral (lying buried in the membrane) or peripheral (lying on the surface of the membrane).
Fluid mosaic model shows the quasi-fluid nature of lipids enables lateral movement of proteins within the bilayer.
Fluidity is the measure of the ability of the membrane to allow movement within itself.
Fluid nature of the membrane is important for cell division, cell growth, the formation of intercellular junctions, secretion and endocytosis.
The functions of plasma membrane are:
1) It surround the cytoplasm of the cell and acts as a mechanical barrier which protects the cellular components.
2) It controls the movement of molecules in and out of the cell. It is a selectively permeable membrane which permits the entry/exit of certain molecules, while restricts the transportation of other molecules.
3) It contains receptors and molecules which act as points of recognition and attachment of cells.
4) Osmosis occurs through plasma membrane.
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Answer:
Fluid mosaic model are protein arrange in phospholipid protein