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Membrane & Membrane Function.docx

9 Pages

Course Code
Biology 2382B
Jessica Kelly

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Lecture 13MembraneMembrane FunctionBiomembranes Membranesdefine what is a cell Basic components Allow specialized cellular functions tooccur in a localized manner Lipids SterolsIe provide an internal environmentProteins about 50 different in chemical composition fromthe external environmentPhospholipids are amphipathic they spontaneously form lipid bilayers in aqueoussolutions energetically favourable properties of fatty acids confer properties onto the bilayers ie how fluid bilayer issaturationsize of fatty acids Liposomes naturally form as the edges of a bilayer sheet interact unfavourably with water but favourably with one another hydrophobic effectmicelles do not form readily bc the fatty acid chains of phosphoglycerides are too bulky to fit in the interior of the micelle1
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