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Microbial Metabolism

Microbial Metabolism
Which of the following does not produce oxygen as a product of photosynthesis?

Cyanobacteria
Phytoplankton
Oak trees
Purple sulfur bacteria

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Microbial Metabolism
Standard free energy change (ΔG) can be expressed as

ΔG° = -RTlnkeq
ΔG° = R/Tlnkeq
ΔG° = -RT/lnkeq
ΔG° = RTlnkeq

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Microbial Metabolism
In order to get inorganic phosphorous into organic compounds, the phosphate ion is incorporated via

oxidative phosphorylation
both (a) and (b)
substrate level phosphorylation
DNA

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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
RNA
phospholipids
all of these

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Microbial Metabolism
The major route for incorporation of ammonia (NH4+) into organic compounds is via

atmospheric nitrogen fixation
reduction of pyruvate or alpha-ketoglutarate by enzymes
all of these
oxidation of pyruvate

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Microbial Metabolism
High energy transfer compounds are capable of

accepting large amounts of free energy
None of these
measuring free energy
transferring large amounts of free energy

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