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Microbial Metabolism

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

S (elemental sulphur)
H2S
H2
H2O

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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
DNA
all of these
RNA

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Microbial Metabolism
TCA cycle functions in

none of these
anabolic reactions
amphibolic reactions
catabolic reactions

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

all of these
carbon dioxide
nitrate
acetate

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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 phosphorous. At the end of 48 hours, it is expected to find the radioactive label located in

RNA
all of these
enzymes
phospholipids

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Microbial Metabolism
In the passive diffusion, solute molecules cross the membrane as a result of

ionic difference
all of these
pressure difference
concentration difference

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