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Microbial Metabolism

Microbial Metabolism
Nitrogen fixation is a process that requires

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

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Microbial Metabolism
The role of bacteriophyll in an oxygenic photosynthesis is to

use light energy to energize an electron
transfer electrons to an intermediate in the sulfide oxidation pathway
reduce ferridoxin directly
reduce NADP directly

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Microbial Metabolism
Phosphate is considered to restrict the induction of

primary metabolites
both (a) and (b)
secondary metabolites
none of these

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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

DNA
enzymes
RNA
all of these

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Microbial Metabolism
The phosphate inhibition in the clavine formation with Claviceps SD58, can be counteracted by the addition of

lysine
methionine
tryptophan
alanine

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

Alkaline phosphates
Protease
Oxidoreductase
Hydrogenase

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