7K-108 - Net ID KEY A BioBM3310 QUIZ 7a 11/5/08 pyruvate +...

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Net ID KEY A BioBM3310 QUIZ 7 a 11/5/08 1. (12 pts) Given this rxn inside a cell at 310K: pyruvate + NADH + H + lactate + NAD + The intracellular conc are: [pyruvate] = 0.40mM, [lactate] = 0.2mM, [NADH] = 0.04mM, [NAD + ] = 0.40mM, pH = 7.0 The half rxns are: pyruvate + 2H + + 2e - lactate E o ' = -0.19V R = 8.3x10 -3 kJ/mol K NAD + + H + + 2e - NADH E o ' = -0.32V F = 96.5kJ/V mol a. calculate E o ' +0.32V - 0.19V = +0.13V b. calculate G o ' G o' = -nF E o' = -2(96.5kJ/V mol)(0.13V) = -25.1kJ/mol c. calculate G G = G o' + RTln[lactate][NAD+]/[pyruvate][NADH] = -25.1kJ/mol + (2.57kJ/mol)ln(.2)(.4)/(.4)(.04) = -25.1kJ/mol + (2.57kJ/mol)ln(5) = -25.1kJ/mol + 4.1kJ/mol = -21kJ/mol 2. (2 pts) Write the overall reaction of glycolysis. No need to show the chemical structures of reactants and products--- names are OK Glucose + 2NAD+ + 2ADP + 2Pi 2Pyruvate + 2NADH + 2ATP + 2H2O + 2H+ 3. (16 pts) Rxns of glycolysis are shown below, numbered 1 - 10. Glycolytic intermediate molecules are lettered A - L. For (a & b), write the glycolytic intermediate letter(s) or draw as indicated , for (c - g) the rxn number(s) in the blank. Answers can be used more than once,
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7K-108 - Net ID KEY A BioBM3310 QUIZ 7a 11/5/08 pyruvate +...

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