Quiz 8key - Biochemistry 309, Winter 2010 Quiz #8 NAME:_...

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Biochemistry 309, Winter 2010 20 points Quiz #8 NAME:_______________________________ TA:__________________ 1. Does the G of the reaction determine whether a reaction will occur spontaneously? (2 points) Yes. The G defines the equilibrium concentrations of reactants and products and, if the starting concentrations are different from the equilibrium concentrations, the reaction will proceed spontaneously. Does the G of a reaction determine how fast it will happen? (2 points) No. The rate of the reaction is determined by the activation energy of the reaction ( G Ŧ ) not the G. 2. For a reaction that is catalyzed by an enzyme, does the enzyme affect the equilibrium of the reaction? (4 points) No. The enzyme only affects the activation energy of the reaction, not the equilibrium of the reaction, which is fundamental to the reaction. 3. Why does hemoglobin bind to carbon monoxide more poorly than free heme binds carbon monoxide? (2 points) The histidine residue above the heme group prevents the CO from binding
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This note was uploaded on 02/16/2012 for the course BIOL_SCI 309 taught by Professor Somebody during the Winter '10 term at Northwestern.

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