ABSTRACT
It is a well-known fact that the direction of a chemical reaction in solution is not obligatorily easy to predict. Often, this is due to the fact that there exist several kinds of equilibria occurring simultaneously. One can say that the “natural trick” for biochemical reactions of bioenergetics to evolve in the right direction, despite the fact that several of them do exhibit unfavorable Gibbs energies, is the occurrence of coupled reactions. The phenomenon of the coupling of reactions occupies a pivotal place in the multiple biochemical reactions which take a part during the whole phenomena of bioenergetics. There is a displacement of the position of the equilibrium of the redox reaction between the permanganate ion with the reduced form of the antagonist redox pair. The problem is all the more complicated with bioenergetics as it often involves reactions occurring in chains, whose steps themselves result from the superimposition of several equilibria.
