Surprisingly, in a number of reactions in which either ATP or GTP are involved, the critical event is not due to the hydrolysis of the triphosphate, but to its binding. Nevertheless, in which of the following processes is hydrolysis directly involved?

a. release of myosin from actinb. activation of G proteinsc. formation of COPII vesiclesd. phosphorylation of glucosee. transport through the nuclear pore

The correct answer is option d. "phosphorylation of glucose".

Explanation:

The phosphorylation of glucose is one of the most important catabolic reactions that allow to obtain energy from sugars. This reaction is the first step of glycolysis and avoid cells to lose sugars by diffusing back to its transporter. The phosphate used to phosphorylate glucose comes from the hydrolysis of one of the three phosphate of adenosine triphosphate. Therefore, phosphorylation of glucose is a processes where ATP hydrolysis is directly involved.