Question

Order the statements to describe how ATP is utilized by the cell.

1. ADP becomes ATP
2. ATP releases energy
3. The high energy phosphate bond is broken off ATP.
4. The phosphate group is joined to ADP
5. ATP becomes ADP

Answer 1

The cycle involving ATP and ADP can start at any point, but a phosphate bond is broken and ATP releases energy in order to become an ADP. An ADP molecule then can have a phosphate group attached to itself, becomin an ATP again. Therefore, the correct order is: 3 - 2 - 5 - 4 - 1.