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Microbial Metabolism

Microbial Metabolism
In an oxygenic photosynthesis, the green and the purple bacteria do not use which of the following one as an electron source?

H2S
S (elemental sulphur)
H2O
H2

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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

enzymes
RNA
all of these
phospholipids

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

sulfate
CO2
oxygen
nitrate

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

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

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Microbial Metabolism
Hexose monophosphate pathway is also known as

phosphogluconate pathway
malate pathway
oxaloacetate pathway
fumerate pathway

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Microbial Metabolism
Which of the following groups contain(s) many unique coenzymes, such as coenzyme M and coenzyme F420?

Methanotrophs (methane-oxidizing microbes)
Acetogens (acetigens; acetate-producing microbes)
Methanogens (methane-producing microbes)
Sulfate-reducing bacteria

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