Consider these reactions: ATP → ADP + P_i
ΔG°' = −31 kJ/mol
Glucose-6-phosphate → glucose + P_i
ΔG°' = −13 kJ/mol
Glucose + ATP → glucose-6-phosphate + ADP
ΔG°' = ?
What is the ΔG°' of the last reaction?

Question

Quizplus · Accepted Answer

The ΔG°' of the last reaction can be determined by using the equation ΔG°' = ΔG°' of products - ΔG°' of reactants. The ΔG°' of glucose-6-phosphate → glucose and ADP is +13 kJ/mol, since the reverse reaction has a ΔG°' of −13 kJ/mol. Therefore, the ΔG°' of the last reaction can be calculated as follows:
ΔG°' = ΔG°' of products - ΔG°' of reactants
ΔG°' = (0 kJ/mol + 0 kJ/mol) - (−13 kJ/mol − 31 kJ/mol)
ΔG°' = −18 kJ/mol
Therefore, the answer is B) −18 kJ/mol.

Consider These Reactions: ATP → ADP + Pi

Consider These Reactions: ATP → ADP + P_i