Select the appropriate word from the word bank below. Potential energy can be stored in the bonds of certain chemicals in the cell so the cell can harness that energy for work later. Some biologists were studying how energy can be stored in ADP molecules. They tried adding four different substances at position X in this molecule: adenine, hydroxide ion, phosphate group, and ribose.

Drag the molecule that should be added to this ADP molecule at the position labeled X to store
the most chemical potential energy for the cell.