Lipids 0.0 / 5 ? BiologyBiological moleculesASAQA Created by: Kyle FordCreated 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 1 of 6 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 2 of 6 PHOSPHOLIPIDS FOUND IN CELL MEMBRANES CONSIST OF: - GLYCEROL - 2 FATTY ACIDS - PHOSPHATE GROUP PHOSPHATE GROUP = HYDROPHILLIC FATTY ACIDS = HYDROPHOBIC 3 of 6 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 4 of 6 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 5 of 6 EMULSION TEST - LIPIDS - SHAKE TEST TUBE WITH ETHANOL - UNTIL DISSOLVE - POUR INTO WATER - POSITIVE = MILKY EMULSION - MORE MILKY COLOUR - MORE LIPID 6 of 6
Comments
No comments have yet been made