Practice Exam II- 2009

Practice Exam II- 2009 - 1. The end products of enzymatic...

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1. The end products of enzymatic pathways are often involved in regulation of the pathway that leads to their synthesis. Which of the following is a general model of this type of regulation? a) High concentration of the end-product allosterically regulates the last enzyme of the pathway. b) High concentration of the end-product activates the first enzyme of the pathway. c) Low concentration of the end-product inhibits the last enzyme of the pathway. d) High concentration of the end-product inhibits the first enzyme of the pathway. e) Low concentration of the end-product allosterically regulates the last enzyme of the pathway. 2. The ΔG for a particular uncoupled reaction in a cell is -5.0 kcal/mol. Based on that information, which of the following is false ? a) The reaction releases free energy b) An enzyme will likely be utilized to allow the reaction to proceed in a useful time frame. c) The rate of this reaction will be determined by the quantity of activation energy required to initiate it. d) The products of the reaction have more free energy than the reactants. e) The transition state (reactants pass through this state on their way to becoming products) possesses the most free energy. 3. A change in environmental pH can inhibit the proper functioning of an enzyme by: a) Changing the charge of its active site. b)
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This note was uploaded on 10/27/2010 for the course BIO 102 taught by Professor Alaie during the Fall '08 term at CUNY Hunter.

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Practice Exam II- 2009 - 1. The end products of enzymatic...

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