How do viability stains usually distinguish between living cells and dead cells?
A) The chemical fluoresces only when bound to ribosomes that are actively synthesizing proteins.
B) The chemical stain is taken up by living cells and once metabolized becomes fluorescent.
C) The dye specifically targets intact cytoplasmic membranes.
D) The dye's fluorescence is quenched by dead cells.
Metatranscriptomics and metaproteomics are favored over metagenomics when ________ is of more interest than ________.
A) gene presence / phylogeny
B) phylogeny / gene presence
C) function or gene expression / gene presence
D) gene presence / function or gene expression
The rolled tube method is most commonly used for isolating which grouping of microorganisms?
A) anaerobes
B) chemolithotrophs
C) chemoorganotrophs
D) aerobes
What unit is isotopic fractionation reported as?
A) parts per billion
B) parts per million
C) parts per thousand
D) parts per trillion
Thirty organisms containing the same phylogenetic marker are all considered to be within the same
A) phylotype.
B) species.
C) functional group.
D) phylogenetic tree.
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