Lipids

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  • Created by: Kyle Ford
  • Created on: 22-02-18 12:56

TRIGLYCERIDES

ONE MOLECULE OF GYLCEROL + 3 FATTY ACIDS

- FATTY ACIDS

- LONG TAILS - MADE OF HYDROCARBONS - HYDROPHOBIC  
- MAKE LIPIDS INSOLUBLE IN WATER

BASIC STRUCTURE:

CONDENSATION REACTION

- FATTY ACID + GLYCEROL MOLECULE

- ESTER BOND BETWEEN THEM

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FATTY ACIDS

CAN BE:
- SATURATED = SINGLE C-C BOND BETWEEN CARBON ATOMS - SATURATED WITH H
- UNSATURATED = DOUBLE C=C BOND BETWEEN CARBON ATOMS - CAUSE CHAIN KINK

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PHOSPHOLIPIDS

FOUND IN CELL MEMBRANES

CONSIST OF:
- GLYCEROL
- 2 FATTY ACIDS
- PHOSPHATE GROUP

PHOSPHATE GROUP = HYDROPHILLIC
FATTY ACIDS = HYDROPHOBIC

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TRIGLYCERIDES - ENERGY STORAGE MOLECULES

LONG HYDROCARBON CHAINS

- contain alot of chemical energy
- alot of energy released when broken down
- X2 amount of energy of carb per gram

INSOLUBLE
- no effect on w.p
- no water enter by osmosis (cause swelling)

- clump together - form insoluble droplets - tails face inward

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PHOSPHOLIPIDS - BILAYER OF CELL MEMBRANES

HEADS HYDROPHILLIC
TAILS HYDROPHOBIC


- FORM DOUBLE LAYER


CENTRE = HYDROPHOBIC


- WATER SOLUBLE SUBSTANCES - CANT PASS THROUGH
- MEMBRANE ACTS AS A BARRIER

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EMULSION TEST - LIPIDS

- SHAKE TEST TUBE WITH ETHANOL - UNTIL DISSOLVE
- POUR INTO WATER

- POSITIVE = MILKY EMULSION

- MORE MILKY COLOUR - MORE LIPID

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