試題詳解

18. When a mixture of glucose 6-phosphate and fructose 6-phosphate is incubated with the enzyme phosphohexose isomerase, the final mixture contains twice as much giucose 6-phosphate as fructose 6-phosphate. Which one of the following statements is most nearly correct, when applied to the reaction below? (R = 8.315 J/mol·K 且 T = 298 K) 

Glucose 6-phosphatefructose 6-phosphate
(A)  ΔG'° is +1.7 kJ/mol.
(B)  ΔG'° is -1.7 kJ/mol.
(C) ΔG'° is incalculably large and negative.
(D) ΔG'°is incalculably large and positive.
(E)  ΔG'° is zero.