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Microbial Metabolism

Microbial Metabolism
The bacteriochlorophylls used by the anoxygenic bacteria have absorbance maxima located in the_____portion(s) of the spectrum.

blue
infrared
green
ultraviolet

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Microbial Metabolism
The catabolic reaction, pentose-phosphate exists in

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

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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?

H2
H2O
S (elemental sulphur)
H2S

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Microbial Metabolism
Entner - Doudoroff pathway is not found in

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

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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

all of these
enzymes
RNA
DNA

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Microbial Metabolism
Assimilatory sulfate reduction involves the nucleotide __________ during the incorporation of H2S in the production of __________ .

GTP; cytosine
ATP; methionine
ATP; cytosine
UTP; cytosine

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