biological membranes: lipids
- Created by: Rosie Young
- Created on: 14-02-13 16:16
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- Biological molecules: lipids
- functions
- energy
- energy storage
- biological membranes
- insulation
- protection
- essential fatty acids must be taken in complete as part of the diet
- fatty acids
- acid group
- hydrocarbon chain
- saturated
- single bond
- unsaturated
- double bond
- triglycerides
- glycerol molecule
- 3 fatty acids
- a condensation reaction forms an ester bond
- monoglyceride formed
- many monoglycerides = troglyceride
- insoluble
- hydrophobic
- phospholipids
- glycerol molecule
- 2 fatty acids
- phosphate group
- hydrophilic head
- hydrophobic tail
- respiration of lipids requires the hydrolysis of the ester bonds
- the respiration of 1g of lipids gives out twice as much energy as the respiration of carbohydtrates
- lipids don't reduce the water potential of a cell
- cholesterol
- 4 carbon based rings
- helps regulate the fluidity of membranes
- steroid hormone
- testosterone
- oestrogen
- vitamin D
- excess cholesterol
- gallstones
- familial hypercholesterolaemia
- atherosclerosis
- functions
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