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Microbial Metabolism

Microbial Metabolism
Nitrogen fixation is a process that requires

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

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Microbial Metabolism
Which of the following(s) is/are the products of the light reactions of photosynthesis?

ATP and O2 only
ATP, NADPH, and O2
ATP only
NADPH only

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Microbial Metabolism
Assimilatory sulfate reduction involves the nucleotide __________ during the incorporation of H2S in the production of __________ .

GTP; cytosine
ATP; cytosine
ATP; methionine
UTP; cytosine

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

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Microbial Metabolism
Bacteriochlorophyll differs from chlorophyll in what way?

Both (b) and (c)
The chelated metal in bacteriochlorophyll is not Mg
They have different absorption spectra
There are chemical differences between the two chlorophyll in their side (R) groups

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Microbial Metabolism
In the passive diffusion, solute molecules cross the membrane as a result of

concentration difference
all of these
pressure difference
ionic difference

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