Exam 16: Diversity of Bacteria

Which bacterial genus is LEAST related to the others listed?

A moistened swab rubbed onto a personʹs forearm then onto a nutrient agar plate with 7.5% NaCl would most likely result in the isolation of ________ spp.

Simple staining and microscopy could easily distinguish the different taxa intermixed within a community of Sarcina, Staphylococcus, and coryneform bacteria.

Pseudomonads are aerobic, gram-positive, polar flagellated, bacillus-shaped cells.

Which feature(s) differentiate(s) Actinobacteria from Firmicutes?

Due to the presence of mycolic acids in the cell wall of Mycobacterium spp., the ________ staining procedure can be used as a diagnostic tool to identify this genus.

Bacteria in the phylum ________ occur as elementary or reticulate bodies depending on their life cycle stage, are obligate intracellular parasites, and also have relatively small genomes.

Compare and contrast the human pathogens and non-pathogens in Clostridium. Propose a reason for why this differentiation is challenging to assay in the laboratory (NOT on living eukaryotic animal models).

During stationary phase, group members of Serratia produce prodigiosins that contain pyrrole. Considering its structural relatedness to other pyrrole-containing molecules of known function (e.g., chlorophylls, bacteriochlorophylls, porphyrins), propose a potential ecological role for these compounds in soil where they are involved in something other than photosynthesis.

Which of the following best distinguishes deltaproteobacteria from epsilonproteobacteria?

Which of the following traits is NOT a characteristic of Caulobacter?

Which of the following organisms is most likely to form a relationship with Syntrophobacter wolinii?

Members of the ________ are the most abundant bacteria present in the large intestine of humans and contain unusual ________ in their cell membranes.

Some Streptomyces spp. can biosynthesize several chemically unrelated structures that act as different antibiotics.

When looking under a transmission electron microscope, you observe pirellulosome in a bacterium. This bacterium likely belongs to the Planctomycetes.

A pink-pigmented facultative methylotrophic bacterium is LEAST likely to be classified as a member of

Many Listeria spp. grow well at cold temperatures, so although refrigeration is excellent at preventing growth of most other pathogens, it is NOT very useful at minimizing growth of contaminated foods.

Members of the ________ are particularly abundant in the oceans, chemoorganotrophic, rarely pathogenic, and often produce pigments when grown on complex media.

Except that they are not produced in the cytoplasm, conidia produced by Streptomyces spp. are chemically quite similar in composition to endospores produced by Bacillus spp.

Which phylum harbors the most functional diversity observed and also has the most cultured representatives?