Download - Lipids
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LIPIDS
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Characteristics of Lipids• Composed of Carbon, Hydrogen, and
Oxygen• Greater than 2:1 ratio of H:O• Includes fats, oils, phospholipids, and
cholesterol• Building blocks are fatty acids and
glycerol.• Energy storage molecules• Phospholipids part of cell membrane
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Fatty Acid Structure
• Carboxyl group (COOH) forms the acid.• “R” group is a hydrocarbon chain.
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A Representative Fatty Acid
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SaturatedFatty Acid
UnsaturatedFatty Acid
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Glycerol
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Synthesis of a Fat
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A Phospholipid
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Phospholipids
• Contains a phosphate group• Two fatty acid and one phosphoric acid
molecule condensed with a molecule of glycerol
• Polar –OH group of phosphate are attracted to polar water molecules while rest of molecule is non-polar
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Phospholipids
• Major components of cell membranes• Structure of phospholipids cause then to
orientate themselves into bilayers with a hydrophobic centre. This is the essential basis of cell membranes.