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Microbial Metabolism

Microbial Metabolism
Which of the following(s) is/are the products of the light reactions of photosynthesis?

NADPH only
ATP and O2 only
ATP only
ATP, NADPH, and O2

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

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

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Microbial Metabolism
Incorporation of atmospheric N2to NH4+ occurs via the process of

deamination
transamination
assimilatory nitrate reduction
nitrogen fixation

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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

enzymes
phospholipids
all of these
RNA

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Microbial Metabolism
Which of the following is responsible for phosphate solubilization?

Streptomyces
Bacillus
Streptococcus
Clostridium

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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?

S (elemental sulphur)
H2S
H2
H2O

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