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Microbial Metabolism

Microbial Metabolism
Anoxygenic photosynthetic bacteria oxidize

water
sulfide
oxgyen
ammonia

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Microbial Metabolism
If ΔG of a chemical reaction has a negative value, the reaction

requires energy
releases energy
none of these
both (a) and (b)

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Microbial Metabolism
When acetate is the sole source of carbon for some microorganisms, the cycle which is used, is called

glyoxylate pathway
glycolyic pathway
pentose phosphate pathway
oxaloacetate pathway

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Microbial Metabolism
The glyoxylate cycle is used by some microorganisms when___________ is the sole carbon source.

carbon dioxide
nitrate
acetate
all of these

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Microbial Metabolism
Incorporation of atmospheric N2to NH4+ occurs via the process of

assimilatory nitrate reduction
deamination
transamination
nitrogen fixation

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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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