Cells and Organelles-Membranes and Lipids 0.0 / 5 ? AllUniversityOther Created by: jessicaCreated on: 19-03-13 16:55 What are the major features of the membrane? sheet-like bilayer of lipids containing a mosaic of proteins, held together by non-covalent interactions,asymmetric, fluid in structure 1 of 6 Describe lipids? soluble in organic solvents, non-polymeric, associate together by non-covalent forces 2 of 6 What are the four main types of lipid? free fatty acids, triglycerides, phospholipids and steroids. 3 of 6 Describe free fatty acids one carboxylic acid group, weak acids that are normally around a neutral pH, variable chain length 14-24 C atoms. 4 of 6 How does the melting point of fatty acids increase? chain length, but decreases with the number of double bonds. Therefore a long chain saturated fatty acid will have a high melting temperature 5 of 6 What are sphingolipids? built around sphingosine, often glycosylated to form complex glycolipids (gangliosides & cerebrosides), 6 of 6
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