Answer:
ADP gains a phosphate group to create ATP, which stores energy for making sugars.
Step-by-step explanation:
ATP is the usable form of energy that is used to drive cellular activities such as transport and growth and development among other processes. It can also be used for energy storage for future use by cellular reactions.
ATP is formed when ADP gains a phosphate group, which results to the formation of ATP.
Then the energy stored in ATP is released when ATP is broken down to form ADP and a phosphate group. More energy may be released when the second phosphate is broken down forming AMP and another phosphate group.