January 14 - J anuary 14 L ipids: fats, non-polar Steroids...

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January 14 Lipids: fats, non-polar Steroids o Made in gonads and adrenal cortex Fats o To synthesize a fat need a glycerol o Dehydration reactions join fatty acids (has –COOH = means its an acid) to glycerol o Fats consist of glycerol linked to three fatty acids called a triglyceride Phospholipids o Fatty acid attached on bottom of Serine, Phosphate and glycerol o Double bonds cause kinks in phospholipid tails o Saturated fatty acid: as many hydrogen as possibly can, lower permeability o Fatty acids form bilayers o Unsaturated fatty acid: high permeability o Fatty acids have hydrophilic head and hydrophobic tails Always four bonds to carbon Saturated lipids are usually solid but unsaturated are usually liquid Tails interact with each other, heads interact with water Fluid-mosaic model: accepted model of cell interior Proteins embedded in membrane which is full of a phospholipid bilayer o Integral membrane proteins: go from top to bottom o Peripheral: stuck on inside
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This note was uploaded on 02/25/2011 for the course BIO 101 taught by Professor Pytel during the Winter '11 term at Union College.

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January 14 - J anuary 14 L ipids: fats, non-polar Steroids...

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