Question

1. a molecule of atp has phosphate groups attached to it. when the cell needs energy, it converts atp into. when the cell is able to store energy, it converts to.

Explanation:

ATP (adenosine tri - phosphate) has three phosphate groups. When energy is needed, ATP loses a phosphate group and becomes ADP (adenosine di - phosphate). When energy is stored, ADP gains a phosphate group to become ATP.

Answer:

A molecule of ATP has three phosphate groups attached to it. When the cell needs energy, it converts ATP into ADP. When the cell is able to store energy, it converts ADP to ATP.