A method for producing ATP in which a high-energy phosphate group from an organic molecule is added to ADP

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Substrate-level Phosphorylation

A method for producing ATP in which an inorganic phosphate group is added to ADP using the energy from an electrochemical gradient. The process in cellular respiration in which most ATP are generated

Oxidative Phosphorylation

Two ways to generate ATP include

- Substrate-level Phosphorylation
- Oxidative Phosphorylation

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A nucleotide that provides the energy needed to drive essential physiological processes in living organisms through the breakage of a phosphate bond (ATP -> ADP + Pi)

Adenosine triphosphate (ATP)

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- Adenine
- Ribose
- Three phosphate groups

Components of ATP

The negatively charged phosphate groups in ATP repel each other, leading to high-energy phosphate bonds. When these bonds are broken and phosphate group(s) released (dephosphorylation), energy is released to help drive endergonic reactions. The addition of a phosphate group (phosphorylation) to ADP regenerates ATP.

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