Which statement is TRUE for "far from equilibrium" reactions in a cell?
A) They are irreversible under all conditions.
B) Their standard free-energy changes are typically large and positive.
C) They are common control points of regulation in a metabolic pathway.
D) All of the statements are true.
E) None of the statements is true.

Question

Quizplus · Accepted Answer

Far from equilibrium reactions in a cell are the reactions that have a large positive or negative free energy change, and they are typically irreversible. These reactions are also common control points of regulation in a metabolic pathway because they are important to regulate the flow of the pathway and maintain metabolic steady-state. Therefore, option C is correct. Option A is incorrect because some far from equilibrium reactions can be reversible under certain conditions. Option B is incorrect because far from equilibrium reactions can have large negative free energy changes as well. Option D and E are incorrect because only option C is true.

Which Statement Is TRUE for "Far from Equilibrium" Reactions in a Cell