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Microbial Metabolism

Microbial Metabolism
Nitrogen fixation is a process that requires

energy
both (a) and (b)
an anaerobic environment
an aerobic environment

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Microbial Metabolism
The relationship between an oxidation-reduction potential difference and the standard free energy change is (where n is the number of moles of electron transferred, F= Faraday's constant and E°= standard oxidation-reduction potential difference)

ΔG° = nFlnE°
ΔG° = nFE°
ΔG° = -nFlnE°
ΔG° = -nFE°

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Microbial Metabolism
Radioisotopes are frequently used in the study of cells. Assume a culture of E. coli is grown in a culture medium containing radioactive sulphur. At the end of 48 hours, it is expected to find the radioactive label located in

RNA
all of these
DNA
enzymes

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Microbial Metabolism
The reactions of the cell that are carried out for capturing energy are called

metabolism
anabolism
catabolism
activation energy

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Microbial Metabolism
Which of the following groups contain(s) many unique coenzymes, such as coenzyme M and coenzyme F420?

Methanogens (methane-producing microbes)
Acetogens (acetigens; acetate-producing microbes)
Sulfate-reducing bacteria
Methanotrophs (methane-oxidizing microbes)

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Microbial Metabolism
In establishing proton gradient for chemiosmotic ATP generation by aerobic respiration the terminal electron acceptor is

oxygen
nitrate
sulfate
CO2

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