The exergonic reaction directly coupled to the conversion of

The exergonic reaction directly coupled to the conversion of 3-PGA to triose phosphate, and therefore the chemical reaction that provides the energy for trios phosphate formation is The oxidation of NADPH to NADP^+ The splitting of a water molecule by PS-II The synthesis of ATP from ADP + Pi^- The decomposition of ATP to ADP + Pi The reduction of NADPH to NADP^+

Solution

The oxidation of NADHP to NADP+

In the Exergonic reaction, there will be a change in the free energy is negative, which indicates the spontaneous reaction.

Here the oxidation of NADHP to NADP+ is an exergonic reaction and thus it provides energy for trios phosphate formation.