Question

which bond is broken to release energy from atp?
second and third phosphate group
ribose sugar and first phosphate group
first and second phosphate group

Explanation:

ATP (adenosine triphosphate) has three phosphate groups. The bond between the second and third phosphate groups (a high - energy phosphate bond) is broken during hydrolysis to release energy, converting ATP to ADP (adenosine diphosphate). The bond between ribose sugar and the first phosphate group is a covalent bond that is not the one broken for energy release in typical energy - yielding reactions. The bond between the first and second phosphate groups also does not release the significant amount of energy associated with ATP's energy - releasing process.

Answer:

second and third phosphate group