Bio9 II - 1) Oxygen is a necessary component in aerobic...

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1) Oxygen is a necessary component in aerobic respiration because its high electronegative properties allow it to attract electrons away from other elements towards itself. This trait is particularly helpful during the electron transport chain when electrons have to be moved around in order to create the proton gradient to power ATP synthase. 2) The electron transport chain is made up of 3 inner membrane proteins, built into the outer membrane of mitochondia, that reduce a molecule of oxygen and use electron energy to pump H+ ions out of the mitochondria. NADH is broken down into H+, NAD+ and 2 electrons in the first protein called NADH dehydrogenase. A carrier called ubiquinone takes these electrons to another protein complex, BC1, where they can drive a proton pump. Between the dehydrogenase and the BC1 complex, FADH2, inside the mitochondrial membrane, also loses its electrons to ubiquinone and H+’s and becomes FAD. Both products also undergo the same fates as those of NADH. These electrons then
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This note was uploaded on 09/27/2011 for the course BIOL 101 taught by Professor Fevzidaldal during the Fall '08 term at UPenn.

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Bio9 II - 1) Oxygen is a necessary component in aerobic...

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