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Microbial Metabolism

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

sulfate
oxygen
CO2
nitrate

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Microbial Metabolism
Anoxygenic photosynthetic bacteria oxidize

water
ammonia
sulfide
oxgyen

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Microbial Metabolism
Which of the following does not produce oxygen as a product of photosynthesis?

Phytoplankton
Oak trees
Cyanobacteria
Purple sulfur bacteria

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

assimilatory nitrate reduction
nitrogen fixation
deamination
transamination

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Microbial Metabolism
TCA cycle functions in

amphibolic reactions
catabolic reactions
anabolic reactions
none of these

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Microbial Metabolism
If radioactive bicarbonate was supplied to bacterial cells, which were actively synthesizing fatty acids, it is expected to find the bulk of the radioactivity in

nucleic acids
cellular bicarbonate
the fatty acids
the cytoplasmic membrane

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