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Old 09-19-2011
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Bacteria I do not understand anaerobes/aerobes

Guys, can u please explain to me, how do aerobic bacteria get oxygen?
in Kaplan notes it is

02- +2H+ ---superoxide dismutase---> H202 ----catalase--->H20 + O2.

So where do they take oxugen reactive species from? do they create free radicals by themselves?
So then I assume, they use this oxygen for their ETC in mitochondria?

How do anaerobes survive?
they ferment some products, but how and what do they do with energy (in which form) and for what?

Thank you
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Old 09-20-2011
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Idea! anaerobes/aerobes

Quote:
Originally Posted by DocSikorski View Post
Guys, can u please explain to me, how do aerobic bacteria get oxygen?
in Kaplan notes it is

02- +2H+ ---superoxide dismutase---> H202 ----catalase--->H20 + O2.

So where do they take oxugen reactive species from? do they create free radicals by themselves?
So then I assume, they use this oxygen for their ETC in mitochondria?

How do anaerobes survive?
they ferment some products, but how and what do they do with energy (in which form) and for what?

Thank you
THe macrophages in our body makes the oxygen reactive species which is utilized by the aerobes in the body.
The bacteria have glycolytic pathway, TCA cycle and finally ETC to utilize this oxygen.
Anaerobes ferment glucose to pyruvate (anaerobic glycolysis).The pyruvate is converted to lactic acid,ethanol or butyric acid or propionic acid etc
The ATP produced are utilized for their other functions.
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Old 09-20-2011
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Default

I see,
but here is the thing - how would than aerobes grow without macrophages, producing reactive oxygen species?
lIke on a petri dish
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Old 09-21-2011
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Default anaerobes/aerobes

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Originally Posted by DocSikorski View Post
I see,
but here is the thing - how would than aerobes grow without macrophages, producing reactive oxygen species?
lIke on a petri dish
I guess they use atmospheric oxygen .
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