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MICROBIAL METABOLISM

Microbial Metabolism
During the carboxylation phase of the Calvin cycle, CO2 combines with

phosphoglyceraldehyde
ribulose 1,5 - bisphosphate
pyruvic acid
oxaloacetic acid

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Microbial Metabolism
Which of the following groups contain(s) many unique coenzymes, such as coenzyme M and coenzyme F420?

Sulfate-reducing bacteria
Methanogens (methane-producing microbes)
Acetogens (acetigens; acetate-producing microbes)
Methanotrophs (methane-oxidizing microbes)

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

concentration difference
all of these
ionic difference
pressure difference

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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
S (elemental sulphur)
H2S
H2

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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

phospholipids
enzymes
RNA
all of these

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