The importance of oxygen in respiration

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  • The importance of oxygen in respiration
    • Acts as the final acceptor of hydrogen atoms produced in glycolysis & the Krebs cycle
    • Has to remove hydrogen atoms at the end of the chain otherwise there would be a 'back-up' of protons and electrons along the chain and respiration would stop
      • Illustrated by the effect of cyanide on repiration > inhibits the final enzyme of the ETC.  This enzyme catalyses the addition of H ion & electrons to oxygen to form water.


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