How does ATP synthesis during the electron transport chain and chemiosmosis differ from the way ATP is produced in glycolysis and the citric acid cycle?
The ATP synthesis during the electron transport chain(oxidative phosphorylation) and chemiosmosis take place with the help of generation of proton gradient across the semi-permeable membrane of when electrons would flow from one electron carrier to another. For example, the ATP synthesis generation during photosynthesis. On the other hand, ATP generated during glycolysis and Krebs cycle is synthesized by substrate level phosphorylation. During the substarte level phosphorylation, direct phosphorylation of ADP with phosphate group lead to formation of ATP. This ATP is not generated using the energy from the coupled reaction.
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