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Microbial Metabolism

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

Oak trees
Phytoplankton
Purple sulfur bacteria
Cyanobacteria

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

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

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Microbial Metabolism
The glyoxylate cycle is used by some microorganisms when___________ is the sole carbon source.

nitrate
acetate
all of these
carbon dioxide

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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

the fatty acids
nucleic acids
cellular bicarbonate
the cytoplasmic membrane

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Microbial Metabolism
Most of the energy in aerobic respiration of glucose is captured by

the enzyme formic-hydrogen lyase
electron transport of electrons from NADH
long-chain fatty acid oxidation
substrate-level phosphorylation

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Microbial Metabolism
The catabolic reaction, pentose-phosphate exists in

eukaryotic cells
prokaryotic cells
prokaryotic and eukaryotic cells both
none of these

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