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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
In an oxygenic photosynthesis, the green and the purple bacteria do not use which of the following one as an electron source?

H2O
H2
H2S
S (elemental sulphur)

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Microbial Metabolism
TCA cycle functions in

catabolic reactions
anabolic reactions
amphibolic reactions
none of these

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Microbial Metabolism
Which of the following catalyze liberation of orthophosphate from organic P compounds and inorganic pyrophosphate ?

Oxidoreductase
Alkaline phosphates
Hydrogenase
Protease

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Microbial Metabolism
The major route for incorporation of ammonia (NH4+) into organic compounds is via

atmospheric nitrogen fixation
reduction of pyruvate or alpha-ketoglutarate by enzymes
all of these
oxidation of pyruvate

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Microbial Metabolism
The bacteriochlorophylls used by the anoxygenic bacteria have absorbance maxima located in the_____portion(s) of the spectrum.

green
ultraviolet
blue
infrared

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