Answer:
ATP is important in biochemical reactions because it is the main source of energy for most cellular processes. ATP stores and releases energy in the form of a high-energy phosphate bond, which is used to power metabolic processes such as cellular respiration. ATP is similar to a rechargeable battery in that it can be recharged and reused. Like a battery, ATP stores energy in its bonds between the second and third phosphate groups. When ATP is "charged," it is in its fully charged form, ATP. When it is "run down," it is in its uncharged form, ADP. The transfer of phosphate groups between ATP and other molecules is what powers many of the processes in cells.