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Unformatted text preview: primary constituent in the fungal cell wall. Lipids. Lipids are organic molecules composed of carbon, hydrogen, and oxygen atoms. In contrast to carbohydrates, the ratio of hydrogen atoms to oxygen atoms is much higher. Lipids include steroids, waxes, and the most familiar lipids, fats. Fat molecules are composed of a glycerol molecule and one, two, or three molecules of fatty acids. A fatty acid is a long chain of carbon atoms with associated hydroxyl (–OH) groups. At one end of the fatty acid is an organic acid (–COOH) group. The fatty acids in a fat may be all alike or all different. They are bound to the glycerol molecule during dehydration synthesis, a process that involves the removal of water (Figure 1 ). The number of carbon atoms in a fatty acid may be as few as four or as many as 24....
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This note was uploaded on 11/11/2011 for the course BIO 101 taught by Professor Pesthy during the Fall '07 term at Texas State.
- Fall '07