Lipids 0.0 / 5 ? BiologyBiological moleculesASWJEC Created by: jupiter1997Created on: 08-04-15 17:56 General Contains carbon, hydrogen and oxygen Non-polar Insoluble in water Triglycerides formed by combinining 1 glycerol and 3 fatty acids in a condensation reaction Ester bond is formed between the two molecules 1 of 4 Properties Saturated Fatty Acids (usually in animals) No carbon-carbon double bonds Maximum number of hydrogens High intake can cause heart disease Unsaturated Fatty Acids (usually in plants) Contains carbon-carbon double bonds Doesn't have maximum number of hydrogens 2 of 4 Roles Forms plasma membrane other roles: excellent energy reserve in plants and animals acts as insulator against heat loss when stored under skin provides protection for interal organs against damage triglycerides produce metabolic water when oxidised waterproof - waxy cuticle prevents water loss 3 of 4 Phospholipids contains 2 fatty acids and 1 phosphate group hydrophillic head / interacts with water / polar / phosphate and glycerol head hydrophobic tail / interacts with fat / non-polar / fatty acid tail 4 of 4
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