In class notes for August 31, 2007

In class notes for August 31, 2007 - Introduction to...

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Introduction to Biological Sciences 110a In class notes for August 31, 2007 Atoms o Biological material has more Carbon, more Hydrogen, and less Silicon. o Carbon, Nigtrogen, Oxygen, and Hydrogen are the elements in over 99% of living organisms. o Life needs stability (Stable molecules) and diversity. This requires covalent bonds. Covalent bonds are stronger than other bonds and are directional. (They can be put together in many ways) Small atoms make stronger bonds. o C, N, O, H are the smallest so they form the strongest covalent bonds. Phosporous (P) and Sulfer (S) make short-lived covalent bonds. o Can transfer energy from one molecule to another. o Atoms make molecules. Molecules o 70%-75% of every cell is water. A water molecule is polar, meaning the electrical charge is unevenly distributed. Oxygen has a greater electron affinity so it pulls from the hydrogen. Written
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In class notes for August 31, 2007 Water dissociates o Very little water is actually dissociated. This tiny fraction of molecules, though, is enough to allow water to react with acids and bases. A reaction:
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This note was uploaded on 02/22/2009 for the course BSCI 110A taught by Professor Broadie/patton during the Fall '08 term at Vanderbilt.

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In class notes for August 31, 2007 - Introduction to...

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