Concept11 - Concept 5.3 Lipids are a diverse group of...

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Concept 5.3 Lipids are a diverse group of hydrophobic molecules Unlike other macromolecules, lipids do not form polymers. The unifying feature of  lipids  is that they all have little or no affinity for water. This is because they consist mostly of hydrocarbons, which form nonpolar covalent bonds. Lipids are highly diverse in form and function. Fats store large amounts of energy. Although fats are not strictly polymers, they are large molecules assembled from smaller  molecules by dehydration reactions. fat  is constructed from two kinds of smaller molecules: glycerol and fatty acids. Glycerol  is a three-carbon alcohol with a hydroxyl group attached to each carbon. fatty acid  consists of a carboxyl group attached to a long carbon skeleton, often 16 to 18  carbons long. The many nonpolar C—H bonds in the long hydrocarbon skeleton make fats hydrophobic. Fats separate from water because the water molecules hydrogen bond to one another and 
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This note was uploaded on 01/04/2012 for the course BSC BSC1005 taught by Professor Orlando,rebecca during the Fall '10 term at Broward College.

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Concept11 - Concept 5.3 Lipids are a diverse group of...

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