Bootcamp/Destroyer discrepancy?

[tooth_hurty]

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On the bootcamp question a day for today, the explanation says that "facultative anaerobes can survive in the presence of oxygen but prefer anaerobic (oxygen lacking) environments" while on DAT destroyer 2015 biology question 7 it says "facultative anaerobes can grow with or without O2, but gather mostly at the top because aerobic respiration produce the most ATP."

So which one is it?

 

[cacajuate]

I would think the main point to take from those two things is that facultative anaerobes can survive in O2 or without O2. The little detail about which do they prefer is past the scope of the DAT.


Could be wrong but thats how I see it.

 

[ywcywc]

A facultative anaerobe is an organism that makes ATP by aerobic respiration if oxygen is present, but is capable of switching to fermentation or anaerobic respiration if oxygen is absent.

Destroyer Explanation is correct that Facultative anaerobes can grow with or without O2, but gather mostly at the top because aerobic respiration produce the most ATP

 

[510586]

Yea, I found this odd as well. This was from Ferali's notes: "Facultative anaerobes can use oxygen when it’s present (more efficient) but switch to fermentation/anaerobic respiration if it isn’t; obligate anaerobes cannot live in presence of oxygen". The Mosby medical dictionary said that a facultative anaerobe is "An organism that is able to grow under aerobic conditions but that develops most rapidly in an anaerobic environment." I'll email Ari or the DATbootcamp people about this, and we will see what they say.

 

[FeralisExtremum]

I went with Campbell's definition on this one (will use O2 if it's present).

 

[DAT Destroyer]

On the bootcamp question a day for today, the explanation says that "facultative anaerobes can survive in the presence of oxygen but prefer anaerobic (oxygen lacking) environments" while on DAT destroyer 2015 biology question 7 it says "facultative anaerobes can grow with or without O2, but gather mostly at the top because aerobic respiration produce the most ATP."

So which one is it?

The term Facultative anaerobe means that an organism functions without the use of oxygen.

It mainly uses Glycolysis. So, if it is placed in the environment that contains oxygen, it simply does not use it.

Strict anaerobe, on the other hand, only survives in the environment that does not contain Oxygen, therefore it will be killed if placed in the environment containing oxygen.

Glycolysis, for example, is an anaerobic pathway, meaning it does not use oxygen, but can easily function in the environment that has oxygen.

Hope this helps.