Part 2: ATP Decomposition When a cell requires energy, it breaks off the last (3) phosphate group from the ATP molecule, which
releases energy. The molecule that is left over is called adenosine diphosphate (ADP) which consists
of adenine, ribose sugar, and TWO phosphate groups. ADP contains less energy than ATP.
COLOR & LABEL the following in the energy molecule below: adenine - red, ribose - orange,
first two phosphate groups - yellow, lone phosphate group -- purple. COLOR the energy
released - green.
• Circle the part of the image that makes up one molecule of ADP.
ENERGY
O
RELEASEDI