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1.2C Lipids

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Term
Definition
lipids   include steroids such as the sex hormones and cholesterol, which serve very important functions in the body; fats and oils, which act as energy storage molecules in organisms, are also lipids; lipids are unable to dissolve in water because they are neutra  
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neutral fats   Fats lack charge on their molecules and are thusly neutral.  
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phospholipids   phospholipids are constructed similar to neutral fats (triglycerides), except a phosphate group takes the place of one of the fatty acids; the main constituent of the plasma membrane; hydrophilic (water-loving) heads of the molecule face the outsides and  
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saturated fatty acids   Saturated fatty acids have the maximum number of Hydrogen atoms on the chains and have no double bonds.  
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triglycerides   triglycerides are made of one glycerol and three fatty acid molecules; the fatty acids are long chains of carbon atoms with hydrogen atoms attached, and end with the acidic group COOH  
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steroids   are composed of a backbone of 4 fused carbon rings and are formed from a cholesterol precursor in the cells.  
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unsaturated fatty acids   Unsaturated fatty acids have some double bonds between two carbon atoms where there is less than 2 hydrogen atoms attached  
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