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Microbial Metabolism

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

all of these
acetate
nitrate
carbon dioxide

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

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

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Microbial Metabolism
Entner - Doudoroff pathway is not found in

eukaryotes
aerobic prokaryotes
anaerobic prokaryotes
Both (a) and (b)

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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
RNA
all of these

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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
Assimilatory sulfate reduction involves the nucleotide __________ during the incorporation of H2S in the production of __________ .

ATP; methionine
ATP; cytosine
GTP; cytosine
UTP; cytosine

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