BIOL 112 Lecture Notes - Lecture 6: Macromolecular Assembly, Polymerization, Micelle
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Document Summary
Major type of lipid found in cell membrane: phospholipid. Spontaneous reaction; depends on properties of phospholipids and ph of solution similar to cell. Hydrophilic heads are facing outwards in contact with water. Hydrophobic tails are facing inwards away from water. Form closed structures: micelle: bulky heads and single fatty acid tail are arranged in a spherical shape, liposome: has a hollow aqueous environment in the middle, bilayer: less bulky head and two fatty acid tails. Non-covalent bonds: phospholipid head and water: ionic - pd, pd - pd, pd - id. 2. fatty acid tails and water: pd - id: between fatty acid tails: id - id. Fluid: phospholipid and protein can move freely within the plane of the membrane. Mosaic: cell membrane is made up of phospholipids and proteins.
