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Accordingly, how many phosphates does ADP have?
If a cell needs to spend energy to accomplish a task, the ATP molecule splits off one of its three phosphates, becoming ADP (Adenosine di-phosphate) + phosphate. The energy holding that phosphate molecule is now released and available to do work for the cell.
In this way, how is energy released from ATP?
In 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.
When the third phosphate is removed from ATP, you get ADP, which stands for Adenosine Di Phosphate. With just 2 phosphates left, the molecule has much less chemical energy, because the high energy bond between the last 2 phosphates has been broken.