Which best describes the Δ G for hydrolysis of creatine phosphate under cellular conditions in which the concentration of creatine phosphate, creatine, and phosphate all equal 1 mM at 25 ° C. The Δ G ° for the hydrolysis of creatine phosphate at 25 ° C is − 43 kJ\mol.
A) Δ G − 43 kJ\mol
B) Δ G = − 43 kJ\mol
C) − 43 kJ\mol Δ G ≤ 0 kJ\mol
D) Δ G 0 kJ\mol

Question

Which best describes the Δ G for hydrolysis of creatine phosphate under cellular conditions in which the concentration of creatine phosphate, creatine, and phosphate all equal 1 mM at 25 ° C. The Δ G ° for the hydrolysis of creatine phosphate at 25 ° C is − 43 kJ\mol.
A) Δ G − 43 kJ\mol
B) Δ G = − 43 kJ\mol
C) − 43 kJ\mol Δ G ≤ 0 kJ\mol
D) Δ G > 0 kJ\mol

Quizplus · Accepted Answer

Under standard conditions, where all reactants and products are at 1 M concentration, ΔG equals ΔG°. Since the concentrations given are 1 mM, which is not standard, but equal for reactants and products, ΔG will still be approximately equal to ΔG°.

Which Best Describes the Δ G for Hydrolysis of Creatine