When a cell uses energy, the metabolic reaction that occurs is that ATP releases a phosphate group and becomes ADP.
ATP, Adenosine Triphosphate is the energy currency of every living cell. it has 3 phosphate groups and the cleavage or hydrolysis of the terminal phosphate group is exergonic. In other words, the hydrolysis of the terminal phosphate group of ATP is an energy-generating reaction.
When ATP is hydrolyzed, the terminal phosphate group is removed and Adenosine diphosphate, ADP, is formed while the released energy is used in metabolic reactions.
More on ATP hydrolysis can be found here: https://brainly.com/question/11813492
