Which one of the following reactions, ADP/ATP is not involved in...

In glycolysis, the conversion of glyceraldehyde 3-phosphate to 1,3-bisphosphoglycerate is catalyzed by the enzyme glyceraldehyde 3-phosphate dehydrogenase.

During this step, inorganic phosphate ($P_i$) is added to the molecule, and $NAD^+$ is reduced to $NADH + H^+$. ATP or ADP is not involved in this specific phosphorylation reaction.

In contrast, the phosphorylation of glucose and fructose 6-phosphate utilizes ATP as the phosphate donor.

The conversion of 1,3-bisphosphoglycerate to 3-phosphoglycerate involves the transfer of a phosphate group to ADP, forming ATP (substrate-level phosphorylation).

Thus, ADP/ATP is not involved in the conversion of glyceraldehyde 3-phosphate to 1,3-bisphosphoglycerate.

Answer: Glyceraldehyde 3 phosphate $\rightarrow$ 1,3 biphosphoglycerate