Oxygen and Krebs cycle

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greenleaf
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Oxygen and Krebs cycle

Post by greenleaf » Thu Dec 31, 2009 3:55 pm

I am doing my revision and don't understand the relationship between oxygen and Krebs. My book says that due to the absence of oxygen, pyruvates generated from glycolysis cannot enter the Krebs cycle and the electron transport chain, thus imcomplete oxidation of organic food is resulted. I understand why the absence of oxygen makes the electron transport chain not happen. It is because oxygen is needed to as the final electron acceptor in the electron transport chain. However, I don't understand why Krebs cycle cannot take place for I cannot see oxygen taking part in the Krebs cyle.

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JackBean
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Post by JackBean » Thu Dec 31, 2009 7:00 pm

The point is, that in Krebs cycle you need NAD+, which you recycle in electron transport. Thus, if e- transport does not work, Krebs cycle doesn't work either ;)
http://www.biolib.cz/en/main/

Cis or trans? That's what matters.

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JackBean
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Post by JackBean » Thu Dec 31, 2009 7:04 pm

BTW I had kind of similar question :-P :)
about17393.html
http://www.biolib.cz/en/main/

Cis or trans? That's what matters.

greenleaf
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Post by greenleaf » Sat Jan 09, 2010 2:12 pm

Thanks for the answer.

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