How many molecules of ATP are obtained from the NADH and...

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Key Concepts

Electron Transport Chain and Oxidative Phosphorylation

The electron transport chain is the series of protein complexes located in the inner mitochondrial membrane that transfers electrons from NADH and FADH2 to oxygen. This process is coupled to the pumping of protons across the membrane, creating an electrochemical gradient that is used by ATP synthase to produce ATP. The number of ATP molecules generated from each NADH or FADH2 varies depending on their entry point into the chain.

Beta-Oxidation

Beta-oxidation is the process by which fatty acyl-CoA molecules are broken down in the mitochondria into acetyl-CoA units. This process also produces reducing equivalents in the form of NADH and FADH2, which are later used to generate ATP through oxidative phosphorylation.

NADH

NADH is a key electron carrier that is generated during beta-oxidation and other metabolic processes. It donates electrons to the electron transport chain, leading to the formation of a proton gradient that drives ATP synthesis through oxidative phosphorylation.

FADH2

FADH2 is another reduced electron carrier produced during beta-oxidation. Unlike NADH, FADH2 donates its electrons at a later site in the electron transport chain, generally resulting in a lower ATP yield per molecule compared to NADH.

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