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a. Catabolism of glucose in glycolysis and pyruvate oxidation - Produces NADH that is used in the ETC.
b. Oxidation of intermediates in the Krebs Cycle - Produces NADH or FADH2 for use in the ETC.
c. Formation of a proton gradient by the electron transport chain- The flow of protons through membrane bound ATP synthase generates ATP
The electron transport chain (ETC) and chemiosmosis are the two processes that make up oxidative phosphorylation. The ETC is made up of a group of proteins that are affixed to the inner mitochondrial membrane and organic molecules that allow electrons to pass through and release energy through a series of redox processes.
An electron transport chain (ETC) is a collection of protein complexes and other molecules that associate protons (H+ ions) with the movement of electrons from electron donors to electron acceptors through redox processes (both reduction and oxidation occur simultaneously).
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