Final answer:
In glycolysis, the exergonic reaction 1,3-diphosphoglycerate > 3-phosphoglycerate is coupled to the reaction ADP + Pi > ATP, resulting in the synthesis of ATP. The energy released by hydrolyzing a phosphate from 1,3-diphosphoglycerate is used to power the conversion of ADP to ATP. This process occurs twice per starting glucose molecule in glycolysis, leading to the synthesis of two ATP molecules.
Step-by-step explanation:
In glycolysis, the exergonic reaction 1,3-diphosphoglycerate > 3-phosphoglycerate is coupled with the reaction ADP + Pi > ATP. This coupled reaction involves the transfer of a phosphate group from 1,3-diphosphoglycerate (1,3-diPG) to ADP, resulting in the synthesis of ATP.
In this process, the energy released by hydrolyzing a phosphate from 1,3-diPG is used to power the conversion of ADP to ATP. This reaction occurs twice per starting glucose molecule in glycolysis, leading to the synthesis of two ATP molecules.