CHM 33300 Study Guide - Quiz Guide: Lipid Bilayer, Benzene, Endocytosis
17 Oct 2016
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Lipids study guide: fatty acids: carboxylic acid with long chain of hydrocarbon side groups. Glycerol phospholipids: major lipid component of bio membranes. Amphibiotic tails and polar phosphyrla-x heads (come from alcohols) Phospholipids: amphipathic; polar head and hydrophobic fatty acids, rearrange structure when in water. Cholesterol: (cid:272)lassified as a (cid:862)sterol(cid:863) (cid:271)e(cid:272)ause c-3 is oxidized to a hydroxyl group, influenced by rigidity. Properties of lipids: 2d fluid with hydrocarbon chains that undergo rapid fluxional motions involving rotations around their c-c bonds. Lateral diffusion: lipids highly mobile, develops self-sealing which means there is lipid flow of molecules after small disruption. Transverse diffusion: requires specialized enzymes because polar head has to pass through hydrocarbon core bilayer. Asymmetry: for biological membranes is necessary for their function causing the different lipid compositions on each side of membrane: fatty acids: stearic acid, oleic acid, linolenic acid, a-linolenic acid.
