Electron Transport Chain Diagram - Mitochondrial Respiration Process #2173104 (License: Personal Use)

This diagram depicts the electron transport chain (ETC) embedded in the mitochondrial inner membrane, highlighting Complexes I (NADH dehydrogenase), II (succinate dehydrogenase), III (cytochrome bc1), IV (cytochrome c oxidase), and ATP synthase (Complex V). Electrons from NADH and FADH₂ move through carriers, driving proton (H⁺) translocation into the intermembrane space to create an electrochemical gradient used by ATP synthase to produce ATP. Key molecules like ubiquinone (Q), cytochrome c, O₂ (final electron acceptor), and ADP/ATP are labeled.

Used in educational biology resources, textbooks, and online courses to teach cellular respiration, oxidative phosphorylation, and bioenergetics; targets students, teachers, and researchers seeking visual reinforcement of ETC mechanics.