And speaking of 99%, I think the level you are at that they won't throw crazy stuff at you like obligate anaerobes that can still ferment in the oxygen exposed tube. As long as you know the basic gist I think it will be fine. But they might have wanted tyou to memorize all the attributes of the bacteria you are looking at. So you might have to know(memorize) for instance that e.coli is a facultative anaerobe. Usually your instructor gives some tips about whats going to be on it.
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