Two bacteria use glucose as carbon source and oxidize it all the
way to CO2. Bacterium A uses O2 as terminal electron acceptor,
Bacterium B uses nitrate. Which bacterium gains more energy? Why?
If the bacterium B could choose between O2 and nitrate as terminal
electron acceptor, which compound would it choose and why?
Homework Answers
1.Bacterium A gains more energy.
2.Because bacterium A have a higher reduction potential compared to Bacterium B since bacterium A uses oxygen as A electron acceptor.
Bacterium B will have lower reduction potential, since it uses inorganic compound like nitrate as a electron acceptor.
3. Bacterium B will choose O2 as a terminal electron acceptor. Because using O2 as a terminal electron acceptor it generates high amount of energy than when nitrate is used. So it will choose oxygen as a terminal electron acceptor.
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