what makes up an atp molecule
The two phosphate groups of ADP are added in series to the 5â carbon of the sugar backbone, while the adenosine molecule attaches to the 1â carbon. The two phosphates in ADP can be correlated with ATP and AMP. ATP consists of three phosphate groups attached in series to the 5â carbon location, whereas ADP contains two phosphate groups attached to the 5â position, and AMP contains only one phosphate group attached at the 5â position.