bio 101 short final review

bio 101 short final review - 12/12/11 Bio Final Review...

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12/12/11 Bio Final Review Session Covalent bonds in Biologically important molecules
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Hydrogen H 1 Oxygen O 2 Carbon C 4 Nitrogen N 3
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Question 7 The following structure has no hydrogen atoms. How many should Answer is 5 H Based on C =4 , O=2, H=1, S=2, N=3
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What kinds of molecules characterize living organisms? -polymers = constructed by covalent bonding of monomers Molecules Monomers Carbohydrates Monosaccharides Proteins 20 amino acids Nucleic acids Nucleotides Lipids Van der walls interactions
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Important Functional Groups Hydroxyl Polar because electronegative oxygen attracts covalent electrons Carbonyl Carbonyl group carbon is bonded to at least one H atom; polar Methyl non polar Carboxyl
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Polar Molecules Water is polar molecule One end has a partial positive charge and the other has a partial negative charge Because it is polar, water is an excellent solvent for ionic or polar solutes
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Cohesion and Adhesion Water molecules exhibit cohesion- form
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bio 101 short final review - 12/12/11 Bio Final Review...

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