Biol 1 - Plasma Membranes

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• Phospholipd molecules form continuos double layer (bilayer)
• Fluid - constantly moving
• Mosaic - arrangement of protein molecules

Proteins in layer:

• Across membrane = transmembrance
• outside = extrinsic
• inside = intrinsic

• Gycerol + 3 Fatty acids
• Fatty Acid Tail are hydrophobic  (repel water)
• Form by condensation reactions

Saturated:
-No double bonds between carbon molecules

Unsaturated:
-one or more double bonds (C=C) 

• A lot like trigylcerides
• One fatty acid replaced with phospholipid head (hydrophilic) on other side

A test for fats:

• Shakes test substance with ethanol and pour solution into water
• Lipid will shows as a milky emulsion