Answer: The correct answer is ADP ( adenosine diphosphate).
ATP ( adenosine triphosphate) is the energy currency of the cell. It stores energy in its high energy phosphoanhydride bonds, which are formed between phosphate. During hydrolysis, it loses a phosphate and the large amount of stored chemical energy is released. During this reaction, ATP is converted into ADP and inorganic phosphate.
Thus, ADP is formed when ATP loses a phosphate.
