Bio5 LECTURE 4

Bio5 LECTURE 4 - DISSOCIATION OF WATER H2O H OH[H...

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DISSOCIATION OF WATER : H 2 O H + + OH - [H + ] INFLUENCES ELECTRICAL CHARGE ON BIOMOLECULES INFLUENCES FUNCTION IN ALL AQUEOUS SOLUTIONS : pH = -log 10 [H + ]; [H + ] = 10 -pH [H + ] × [OH - ] = 10 -14 M 2 BUFFERS RESIST pH CHANGE.
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The pH of human blood is very close to The pH of human blood is very close to 7.4. This means that the hydrogen ion 7.4. This means that the hydrogen ion concentration is: concentration is: A. A. 10 10 -8 -8 M < [H M < [H + ] < 10 ] < 10 -7 -7 M M B. B. 7.4 X 10 7.4 X 10 -14 -14 M M C. C. - log(7.4) M - log(7.4) M D. D. antilog(7.4) M antilog(7.4) M E. E. [H [H + ] > [OH ] > [OH - ] ]
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OUTLINE WHY CARBON AS KEY ELEMENT OF LIFE? FUNCTIONAL GROUPS HYDROXYL GROUP CARBONYL GROUP CARBOXYL GROUP AMINO GROUP SULFHYDRYL GROUP PHOSPHATE GROUP METHYL GROUP DEHYDRATION SYNTHESIS MACROMOLECULES CARBOHYDRATES
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ISOMERS: organic molecules with the same atomic composition but different structures that often exhibit different properties 1) Structural isomers 2) Stereoisomers
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ISOMERS: 1) Structural isomers - differ only in the arrangements of covalent bonds
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ISOMERS: 2) Stereoisomers - differ only in the way the atoms are oriented in space
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Bio5 LECTURE 4 - DISSOCIATION OF WATER H2O H OH[H...

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