lipids
- Created by: Margaret Hobart
- Created on: 20-04-21 17:43
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- lipids
- triglycerides
- 1 molecule of glycerol and 3 fatty acids
- condensation reaction
- ester bonds
- fatty acid hydrocarbon tails are hydrophobic (repel water)
- insoluble in water -> don't affect osmosis
- used for energy storage
- lots of energy - small volume
- monomers
- fatty acids have the formula RCOOH
- fatty acids can be saturated or unsaturated (contains C=C)
- fatty acids and glycerol are monomers of lipids
- fatty acids have the formula RCOOH
- phospholipids
- 1 glycerol, 2 fatty acids and 1 phosphate group
- 'hydrophilic' head (phosphate group), 'hydrophobic' tail
- make up bilayer of cell membranes
- heads face towards aqueous environments e.g. cytoplasm
- 'hydrophilic' head (phosphate group), 'hydrophobic' tail
- heads face towards aqueous environments e.g. cytoplasm
- emulsion tests for lipids
- add ethanol and water and shake
- cloudy white emulsion on top if lipids present - the more lipids the thicker the emulsion
- insoluble in water, soluble in organic solvents e.g. alcohol
- triglycerides
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