What is the purpose of the electron transport chain?

The main purpose of the ETC is to generate ATP, which cells use for various biological processes. By transferring electrons through protein complexes and pumping protons across the membrane, the chain creates an electrochemical gradient. This gradient powers ATP synthase to produce ATP from ADP and inorganic phosphate. Additionally, the ETC helps regenerate electron carriers (NAD+ and FAD) required for other metabolic pathways.

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