Concept 1 Review

A Closer Look: Energy and ATP

The ATP molecule can store energy in the form of a high energy phosphate bond joining the terminal phosphate group to the rest of the molecule. In this form, energy can be stored at one location, then moved from one part of the cell to another, where it can be released to drive other biochemical reactions. The energy stored in ATP at one location is released from ATP when the terminal phosphate bond is broken. In this process a phosphate group is detached to yield inorganic phosphate and ADP and results in the liberation of 7.3 kcal/mol (under standard conditions).

To see the process, point to the image below.

Energy and ATP

As you move your mouse over the image, the terminal phosphate group forms a high energy phosphate bond with the molecule, thus creating the triphosphate tail of ATP.

Please visit the Phosphate Groups and Nucleotides Lab Simulations for more information on the chemical energy of ATP. Be sure to use your browser's 'BACK' button to return to this page.