Unformatted text preview: form of the nucleotide, ATP. Cells do not directly use other forms of energy, so that the energy of chemical fuel molecules must be transformed into ATP before cell work can be done. ATP is then used to provide the energy to complete an endergonic chemical reaction. ATP has three "high-energy" phosphate bonds. The second and third phosphate bonds of ATP are unstable. When this phosphate bond is broken by hydrolysis, energy is released (an exergonic reaction). This released energy is just perfect for the amount of energy needed for many cell reactions. This is why we call ATP an energy carrier. It “carries” the energy needed to do the cell work....
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- Spring '10
- Energy, Chemical reaction, Adenosine triphosphate, cell work