what is plasma membrane
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cell membrane is called plasma membrane.it is made up of proteins and lipids.it gives definite shape and size to cell.it protects the cell from external environment.it allows only useful compounds into the cell.it is also called AS selectively permeable membrane.it even gives protection to the cell and it's organelles.
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cell membrane is called plasma membrane.it is made up of proteins and lipids.it gives definite shape and size to cell.it protects the cell from external environment.it allows only useful compounds into the cell.it is also called AS selectively permeable membrane.it even gives protection to the cell and it's organelles.
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PLASMA MEMBRANE
⇒ Plasma membrane is also known as cytoplasmic membrane or plasmalemma.
⇒ It is selectively permeable thin film-like covering membrane of a cell.
⇒ Beside plasma membrane, in eukaryotic cells a intracellular membrane is present ., which surround the vacuole and organelles.
⇒ Danielli and Davson in 1935 proposed a trilamellar model, state that the plasma membrane is formed of bimolecular layer of phospholipids thick sandwiched between two layers of protein.
⇒ Robertson in 1959 proposed 'Unit Membrane Model'.
⇒ Singer and Nicolson in 1972 put forward the 'Fluid Mosaic Model' of membrane structure.
⇒ Main function is to regulate the flow of material into and outside the cell and diffusion of O₂ and CO₂
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