Three hypothetical phosphorylated compounds (A,B,and C)are involved in energy metabolism.Standard free energies of hydrolysis for A = 13.1 kcal/mol,for B = -2.7 kcal/mol,and for C = 6.7 kcal/mol.
What is the sequence in which these molecules could most exergonically phosphorylate?

Question

Quizplus · Accepted Answer

The sequence of exergonic phosphorylation is determined by the standard free energy of hydrolysis. The compound with the highest positive value can phosphorylate those with lower values. Thus, A (13.1 kcal/mol) can phosphorylate C (6.7 kcal/mol), which can phosphorylate B (-2.7 kcal/mol).

Three Hypothetical Phosphorylated Compounds (A,B,and C)are Involved in Energy Metabolism