Electron Transport Chain

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  • Electron Transport Chain
    • Cristae of mitochondria
    • Use of electrons produced in Krebs cycle to synthesise ATP
    • Hydrogen combines with NAD and FAD
      • NADH and FADH donate electrons to first molecule of ETC
        • Protons released and actively transported across membrane
          • Electrons pass along series of oxidation-reduction reactions and lose energy at each level, which is used to combine ADP and inorganic phosphate, forming ATP
            • Protons accumulate and diffuse back into matrix
              • electrons combine with protons and oxygen to form water
                • Oxygen is the final acceptor of electrons
    • Oxygen and its importance in respiration
      • Without it removing hydrogen atoms, the ions and electrons would back up along the chain and the process would halt.
  • Protons released and actively transported across membrane
    • Electrons pass along series of oxidation-reduction reactions and lose energy at each level, which is used to combine ADP and inorganic phosphate, forming ATP
      • Protons accumulate and diffuse back into matrix
        • electrons combine with protons and oxygen to form water
          • Oxygen is the final acceptor of electrons
  • Oxygen and its importance in respiration
    • Without it removing hydrogen atoms, the ions and electrons would back up along the chain and the process would halt.

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