homework 1 KEY - BIBC 102 Summer Session 1 07 Homework 1 1...

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BIBC 102 Name KEY ___ Summer Session 1 07 Homework 1 Discussion Section_________ 1) For the uncatalyzed, first-order reaction: k 1 A B k -1 Define the following, using only starting reactant and product concentrations and rate constants. a. forward reaction velocity, V V = k 1 [A] k -1 [B] b. reverse reaction velocity, -V -V = k -1 [B] k 1 [A] c. and equilibrium constant, K K eq = k 1 /k -1 2) Complete the following sentence: Enzymatic catalysis [ does/ does not ] change the equilibrium constant for a reaction, because… Catalysis does not change the equilibrium constant for a reaction, because there is a direct inverse relationship between K eq and the overall standard free energy change, ∆G°. Since the catalytic activity of the enzyme cannot affect ∆G°, the catalytic activity also does not change K eq . The enzymatic catalysis does decrease the activation energy, ∆G° , required for the reaction to proceed. This will increase the forward and reverse reaction rates and their rate constants, k 1 and k -1 , by the same amount.
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