lipids
- Created by: kierasanghera
- Created on: 21-05-16 18:17
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- lipids
- any biomolecule that dissolves in non polar solvents
- contains carbon,hydrogen and oxygen, is insoluble in water
- trigylcerides
- one glycerol molecule bonded to three fatty acids
- each of the glycerol 3 OH molecules reacts with the carboxyl group on the fatty acid
- this is a condensation reaction and an ester bond is formed
- insoluble in water but soluble in ethanol
- non polar and hydrophobic
- phospholipids
- have a phosphate group, a glycerol molecule and two fatty acids
- hydrophilic (water loving) head and a hydrophobic (water fearing) tail
- may be saturated or unsaturated
- steroids (cholesterol)
- small molecule
- -OH is polar
- 4 hydrocarbon rings and hydrocarbon tail are polar
- ring structure has OH group attatched
- fatty acids
- acid groups at one end (COOH)
- hydrocarbon chain (between 2 and 20)
- saturated
- all possible bonds are made with hydrogen
- unsaturated
- one (monounsaturated) or more (polyunsaturated) double bonds between carbon atoms so fewer can be bonded
- glycerol
- always the same in all three lipids
- 3 carbon molecules with 3 free OH groups
- any biomolecule that dissolves in non polar solvents
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