When atp delivers energy, it does so by breaking the bond between:
question 4 options:
the adenosine group and the phosphate groups
the second and third phosphate
the first and second phosphate
all phosphate groups

The phosphate group is a molecule containing one atom of phosphorus covalently bound to four oxygen residues, two of which may be expressed as a hydroxyl group. They are relatively reactive molecules that readily form phophoester bonds by the interaction with hydroxyl groups.