quiz 8 - 1) Consider the following experiment. Carefully...

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1) Consider the following experiment. Carefully isolated liver mitochondria are placed in a weakly buffered solution. Malate is added as an energy source, and an increase in oxygen consumption confirms that the electron transfer chain is functioning properly within these organelles. Valinomycin and potassium are then added to the mitochondrial suspension. Valinomycin is a drug that allows potassium ions to freely cross the inner mitochondrial membrane. What is the effect of valinomycin on the proton motive force (electrochemical gradient) that had been generated by the oxidation of malate? a) The proton motive force will be reduced to a value of zero. b) There will be no change in the proton motive force. c) The proton motive force will be increased. d) The proton motive force will be decreased, but to a value greater than zero. e) The proton motive force will be decreased to a value less than zero. 2) When glycogen is degraded, glucose-1-phosphate is formed. Glucose 1-phosphate can then be isomerized to glucose-6-phopshate. Starting with glucose 1-phopshate, and ending with 2 molecules of pyruvate, what is the net yield of glycolysis, in terms of ATP and NADH formed? a) 1 ATP, 1 NADH b) 2 ATP, 1 NADH c) 2 ATP, 2 NADH d) 3 ATP, 2 NADH
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3) Starting with glyceraldehydes 3-phosphate and synthesizing one molecule of pyruvate, the net yield of ATP and NADH would be which of the following? (Refer figure in question 2) a) 1 ATP, 2 NADH b) 2 ATP, 1 NADH c) 2 ATP, 2 NADH d) 3 ATP, 2 NADH 4) A biological reaction with a positive value for ∆G o ’ is: a) never favorable within a cellular context. b) favorable within the cellular context only if the products of the reaction are in
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This note was uploaded on 11/10/2011 for the course BMEN 2051 taught by Professor S during the Fall '10 term at Minnesota.

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quiz 8 - 1) Consider the following experiment. Carefully...

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