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The Cell tissue layer AP biology Phospholipides ? orthophosphate head ? Phosphate attracted to water deliquescent hydrophobic Fatty acid repelled by water ? Fatty acid tails ? ? pose as a bilayer Aaaah, one of those structurefunction examples AP biological science Arranged as a Phospholipid bilayer ? Serves as a cellular phoneular obstruction / b establish scraping diametric hydrophilic heads H 2O salt non frozen hydrophobic tails impermeable to gelid molecules polar hydrophilic heads waste AP Biology lipids Cell membrane defines cell ? Cell membrane separates living cell from aqueous surroundings ? thin barrier = 8nm fat allows some substances to cross more than easily than others ? hydrophobic (nonpolar) vs. hydrophilic (polar) ? Controls traffic in & aside of the cell ? AP Biology Permeability to polar molecules?

? Membrane becomes semi-permeable via protein convey ? specific channel allow specific material crossways cell membrane H 2O inside cell aa sugar NH3 AP Biology salt outside cell Cell membrane is more than lipids ? Transmembrane proteins embedded in phospholipid bilayer ? create semi-permeabe channels protein channels in lipid bilyer membrane lipid bilayer membrane AP Biology Why are proteins the perfect molecule to flesh structures in the cell membrane? AP Biology 2007-2008 Classes of amino group acids What do these amino acids have in putting surface? nonpolar & hydrophobic AP Biology Classes of amino acids What do thes e amino acids have in common? I exchange! able the polar ones the best! AP Biology polar & hydrophilic Proteins domains anchor molecule ? Within membrane ? gelid areas of protein nonpolar amino acids ? hydrophobic ? anchors protein into membrane ? On outside surfaces of membrane in fluid ? polar amino acids ? hydrophilic ? extend into AP Biology extracellular fluid & into cytosol Nonpolar areas of protein H+ H+ Examples...If you want to compact a full essay, order it on our website: OrderCustomPaper.com

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