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Microbial Metabolism

Microbial Metabolism
Entner-Doudoroff pathway is found in

aerobic prokaryotes
anaerobic prokaryotes
both (a) and (b)
aerobic eukaryotes

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Microbial Metabolism
Nitrogen fixation is a process that requires

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

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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

enzymes
all of these
DNA
RNA

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

Alkaline phosphates
Oxidoreductase
Hydrogenase
Protease

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

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

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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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