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Microbial Metabolism

Microbial Metabolism
Anoxygenic photosynthetic bacteria oxidize

sulfide
ammonia
oxgyen
water

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

ultraviolet
blue
green
infrared

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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

RNA
enzymes
all of these
phospholipids

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Microbial Metabolism
Aerobic catabolism of glucose yields how much energy (ATP synthesized) relative to glucose fermentation?

Twice as much
More than 10 times as much
Slightly less
About the same

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Microbial Metabolism
DAHP synthetase catalyzes the condensation of

phenylalanine
phosphoenol pyruvate
erythrose-4-phosphate
both (a) and (b)

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

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

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