Answer:
A process called cellular respiration, chemical energy in food is converted into chemical energy that the cell can use, and stores it in molecules of ATP. When the cell needs energy to do work, ATP loses its 3rd phosphate group, releasing energy stored in the bond that the cell can use to do work.
Explanation:
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The hydrolysis of the phosphate bonds in the ATP is used by cells to release energy; whereas the conversion of ADP and phosphate to ATP is used to store energy.
Adenosine thiophosphate (ATP) is the energy coin of the cell.
The hydrolysis of the terminal phosphate bond of ATP is an exergonic reaction that releases energy, which is used by cells to carry out different metabolic functions (e.g. growth, differentiation, reproduction, etc).
When one phosphate group of the ATP molecule is removed by hydrolysis, ATP is converted into ADP and phosphate.
Moreover, during cellular respiration, cells catalyze the formation of phosphate bonds when ADP is combined with phosphate to form ATP.
In conclusion, hydrolysis of the phosphate bonds in the ATP is used by cells to release energy; whereas the conversion of ADP and phosphate to ATP is used to store energy.
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