[Dolphinsiu]

http://www.bio.brandeis.edu/classes/biol132a/midterm1-98.html

How to do Q.5a (especially in advantage and disadvantage of sporulation) and b (Just simply say obligate prefer oxygen while facultative can live in oxygen and without oxygen. OKay?) ?

[Yggdrasil]

Aren't these things which you could find easily in a textbook?  Basically, sporulation creates spores which are very resilient and can survive in conditions that would kill a bacteria (e.g. extreme heat or cold, low moisture).  However, spores won't replicate so if a bacteria were to sporulate during conditions conducive to growth, it would be at a disadvantage because it could not take advantage of the favorable conditions by reproducing.

Obligate anaerobes do not prefer oxygen! Obligate anaerobes use anaerobic respiration only and die in the presence of oxygen because they lack the enzymes to deal with radical oxygen species.  Faculative anaerobes contain the cellular machinery for both anaerobic and aerobic respiration and thus can survive in the presence and absence of oxygen.

[Dolphinsiu]

Thank you! You have helped me to correct my mistakes before exam! Many thanks to you!

I only have notes from my lecturer, but I haven't borrowed microbiology text book before exam, so unlucky of me! But I am lucky to meet you!