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CSIR NET-JRF Cell Biology Membrane stucture and function.

*CSIR NET-JRF*
 Cell Biology
*Membrane structure and function*

#Membranes #Monolayer and #Micelles

*MEMBRANES STUCTURE*
 BiologicaI membranes are uniquely organized arrangement of lipids and proteins (either of which may arrangements have carbohydrate groups). The lipids found in biological systems are often amphipathic, suggesting that they possess both polar and nonpolar groups. The nature of lipid molecules allows membranes to act as effective barriers to polar molecules. The polar moieties of amphipathic lipids typically lie at the surface of membranes, where they interact with water. Proteins interact with the lipids of membranes in a variety of ways. Some proteins associate with membranes via electrostatic interactions with polar groups on the membrane surface, whereas other proteins are embedded to various extents in the hydrophobic core of the membrane. Other proteins are anchored to membranes via covalently bound lipid molecules that associate strongly with the hydrophobic membrane core..

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