Problems2solution-1

Problems2solution-1 - Homework 02 BCHM 562 F08 1) A...

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Homework 02 BCHM 562 F08 – ± – 1) A solution containing 0.1 M compound A is incubated at 25°C and pH 7 with an enzyme that catalyzes the transformation of A to B. At equilibrium, the concentrations of A and B are measured and determined to be 11 mM and 89 mM, respectfully. Calculate K´eq and ∆G°´ for this reaction at 25°C. 2) ∆G°´ for the reaction shown below is -7.1 kJ · mol -1 . What is the ratio of glucose 1-phosphate (G1P) to glucose 6-phosphate (G6P) when equilibrium is reached at 25°C? 3) A. The ∆G°´ for the hydrolysis of phosphoarginine to inorganic phosphate and arginine is – 31 kJ · mol -1 . Determine the free energy change at 25°C and pH 7 in cells, where the concentrations of reactants and products are: [P i ] = 5 mM, [arginine] = 2.6 mM, and [phosphoarginine] = 6.8 mM. A B K eq = [ B ] [ A ] = 89 mM 11 mM = 8.09 G ° = − RT ln K eq = − (8.315 J mol 1 K )(298 K )(ln8.09) = − (2.48 kJ mol 1 )(2.09) = − 5.18 kJ mol 1
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Problems2solution-1 - Homework 02 BCHM 562 F08 1) A...

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