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Microbial Metabolism

Microbial Metabolism
In establishing proton gradient for chemiosmotic ATP generation by aerobic respiration the terminal electron acceptor is

nitrate
oxygen
CO2
sulfate

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

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

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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

DNA
enzymes
all of these
RNA

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Microbial Metabolism
The specific enzyme/(s) of the glyoxylate cycle is/are

both (a) and (b)
anaplerotic
malate synthase
isocitrate lyase

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

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

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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

cellular bicarbonate
the cytoplasmic membrane
nucleic acids
the fatty acids

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