Biochemistry 2280A Study Guide - Midterm Guide: Nicotinamide, Peptide, Ketose
29 Nov 2012
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Document Summary
Separate the content of a cell or organelle from the surrounding environment. Control import and export of molecules; using proteins that span the membrane. Contain sensors or receptors that allow the cell to respond to external stimuli. Lipids: biological molecules with little or no solubility in water but are soluble in organic solvents. Hydrocarbon chains ending in a carboxylic acid group. Contain an even number of carbon atoms- range from 4-36 carbons. In an unsaturated molecule- the first double bond is between c9 & c10: counting from the cooh end. Any additional double bond is usually every three carbons. C number of carbons: number of double bonds if they are cis/trans, and the number they occur on. Ldl = low-density lipoprotein, carries cholesterol to tissues. Hdl = high-density lipoprotein, scavenges cholesterol from tissues. Glycerol is a three-carbon molecule with hydroxyl group at each carbon. Obtained by attaching a fatty acid to each hydroxyl via an ester linkage.
