ADP (adenosine diphosphate)

ADP (adenosine diphosphate) is a molecule involved in energy transfer within cells. It consists of adenosine and two phosphate groups. When a cell needs energy, it converts ADP into ATP (adenosine triphosphate) by adding a phosphate group. ATP then stores and supplies energy for various biological processes. When ATP releases energy, it loses a phosphate group and becomes ADP. Later, the cell can recycle ADP back into ATP. This cycle of converting between ADP and ATP is essential for powering activities like muscle movement, metabolism, and cellular functions.