Exam 14: Functional Diversity of Bacteria

There are currently no known predatory bacteria that are adapted to invade or kill nearby cells.

Which of the following traits do ammonia and nitrite oxidizers share?

Bdellovibrio species are ________ cells that replicate in the ________.

Myxobacteria display ________ behavior and form ________ that produce myxospores.

Diazotrophs are obligately symbiotic bacteria that fix N₂ into ammonia,thus providing a critical source of nitrogen to their host.

Nitrogenase is a critical enzyme in the nitrogen cycle because it catalyzes the

The only group of oxygenic phototrophic bacteria are the

All microbial phototrophs

Bacteria that produce acetate use the same metabolic pathways regardless of whether they are growing in the presence or absence of oxygen.

Aside from using light as a source of energy,another important part of the functional diversity of some bacterial phototrophs is their ability to

Based on the FUNCTIONAL characteristics of the Cyanobacteria and Proteobacteria phyla,which phylum do you think is more deeply rooted in the tree of life (i.e.which phylum branches off closer to the last universal common ancestor)? Use at least two pieces of evidence to support your answer.How could you test your hypothesis?

Design an enrichment strategy for the isolation of a heterotrophic sulfate-reducer that could help clean up the oil spill in the sediments of the Gulf of Mexico.

Sulfate-reducing bacteria are a ________ that are found in ________ environments.

Denitrifying bacteria are often facultative anaerobes,capable of performing other forms of respiration or fermentation as well as nitrate reduction.

Which group of bacteria would you expect to find in a shallow clear hot spring with high concentrations of geochemically produced hydrogen sulfide?

Spirilla and spirochetes are closely related bacteria that exhibit a unique corkscrew motility.

Bioluminescence is controlled by the gene regulatory mechanism called quorum sensing,wherein the

Akinetes and hormogonia are specialized cells,found in some cyanobacteria,that facilitate nitrogen fixation.

The vacuole of the giant sulfide-oxidizing bacterium Thiomargarita namibiensis contains ________ that is used to oxidize sulfide under ________ conditions.

Carboxydotrophic bacteria oxidize carbon monoxide to