# How does atp change structure when releasing energy?

$A T P$ is a carrier of energy, and it keeps it when it is not needed and releasing it when it is.
When energy is released, $A T P$ loses one of its phosphate groups and turns to $A D P$ (ADENOSINE DI-PHOSPHATE). $A D P$ is present in cells and has two phosphate groups firmly attached. The energy from respiration is used to form another phosphate group to each molecule to form $A T P$.
$A T P - A D P + \text{phosphate" + "energy}$, and here is an image for this chemical reaction is given. Observe how in $A D P$, the $\gamma$-$P {O}_{4}$ group is removed and results in release of tremendous energy.