outline 2 - Biological Sciences 110a, Fall 2011 Lecture...

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Unformatted text preview: Biological Sciences 110a, Fall 2011 Lecture Outline #2: Atoms; water; molecular interactions reading: Sections 2.1-2.4 required chemistry: This lecture assumes that you understand valence, covalent bonds, and ionization. Consult Karp Section 2-1 to refresh your memory. You should be familiar with the various conventional ways to write the molecular formulae of covalent compounds. Sometimes all the bonds are shown. Sometimes (for example, CH 3-CH 2-COOH), some are omitted. Sometimes (for example, CH 3 CH 2 COOH) all the bonds are omitted. Consult Karp Section 2-4 for examples. You may be familiar with an organic chemical convention in which hydrogens are omitted altogether. Use this convention only if you are quite familiar with it, and be aware that carbohydrate chemists sometimes use a convention that looks similar, but means something quite different. If your chemistry is a bit rusty, feel free to ask about these things in help sessions or ofFce hours....
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