When a Mixture of Glucose 6-Phosphate and Fructose 6-Phosphate Is $\rightarrow$

Multiple Choice

When a mixture of glucose 6-phosphate and fructose 6-phosphate is incubated with the enzyme phosphohexose isomerase (which catalyzes the interconversion of these two compounds) until equilibrium is reached, the final mixture contains twice as much glucose 6-phosphate as fructose 6-phosphate. Which one of the following statements is best applied to this reaction outlined below? (R = 8.315 J/mol · K; T = 298 K) glucose 6-phosphate $\rightarrow$ fructose 6-phosphate

A) $\Delta$ G'° is incalculably large and negative.
B) $\Delta$ G'° is -1.72 kJ/mol.
C) $\Delta$ G'° is zero.
D) $\Delta$ G'° is +1.72 kJ/mol.
E) $\Delta$ G'° is incalculably large and positive.