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Microbial Metabolism

Microbial Metabolism
Entner - Doudoroff pathway is not found in

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

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Microbial Metabolism
The catabolic reaction, pentose-phosphate exists in

none of these
prokaryotic cells
eukaryotic cells
prokaryotic and eukaryotic cells both

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Microbial Metabolism
Anoxygenic photosynthetic bacteria oxidize

sulfide
water
oxgyen
ammonia

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

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

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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

the cytoplasmic membrane
nucleic acids
the fatty acids
cellular bicarbonate

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