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Microbial Metabolism

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

Purple sulfur bacteria
Phytoplankton
Cyanobacteria
Oak trees

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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
all of these
enzymes
RNA

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Microbial Metabolism
During the carboxylation phase of the Calvin cycle, CO2 combines with

pyruvic acid
oxaloacetic acid
ribulose 1,5 - bisphosphate
phosphoglyceraldehyde

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Microbial Metabolism
The chlorophyll molecules used by eucaryotes and cyanobacteria absorb radiant energy in the____________portion(s) of the visible spectrum.

green
red and blue
red
green and ultraviolet

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Microbial Metabolism
In the passive diffusion, solute molecules cross the membrane as a result of

concentration difference
ionic difference
all of these
pressure difference

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Microbial Metabolism
When acetate is the sole source of carbon for some microorganisms, the cycle which is used, is called

oxaloacetate pathway
glyoxylate pathway
glycolyic pathway
pentose phosphate pathway

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