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.