Exam 18: Other Bacteria

A number of ________ species are fish pathogens and can cause serious problems in the cultivated fish industry.

An isolation method using intense exposure of _________ selects for deinococci.

Species of the genus Prosthecobacter contain two genes that show significant homology to the genes that encode_______ in eukaryotic cells.

Green sulfur bacteria and purple sulfur bacteria can be distinguished by where S0 products are deposited from hydrogen sulfide oxidation.

Most actinomycetes form conidiospores.

Explain how and why Halobacterium and Salinibacter are said to exhibit convergent evolution even though they are phylogenetically distinct.

Phylogenetically, which is the earliest known phototrophic bacterium?

Which thermophilic bacterium is a common source of polymerase used in polymerase chain reactions (PCRs) for amplifying DNA in vitro?

Which gram- positive, phototrophic bacterium contains bacteriochlorophyll g pigments?

Explain how you would isolate an anaerobic, endospore- forming bacterium from its natural environment.

Based on metabolism and on oxygen requirements, the genus Clostridium is classified as_______and_______.

The lactic acid bacteria are usually restricted to habitats in which sugars are present.

Bacteroides are unusual among Bacteria in that they are one of the few groups of organisms to synthesize sphingolipids.

The genus__________ contains species of bacteria that divide in three perpendicular planes to yield packets of eight or more cells.

In the Stickland reaction, each amino acid functions to donate electrons to a hydrogen atom, producing water.

The copolymer of aspartic acid and arginine that is a nitrogen storage product for many of the cyanobacteria is known as a(n)__________ .

A gram- positive microorganism has the following traits: filamentous, forms spores at the end of mycelia, produces antibiotics, produces geosmin, is nutritionally versatile, yields compact "dusty" colonies on agar culture media. These traits describe the genus

Mycolic acid is a characteristic of the genus__________ .

Organisms that produce streptolysin O or S display__________ - hemolysis on blood agar.

The acid resistance of the lactobacilli enables them to continue growing during natural lactic acid fermentations, even when the pH value has dropped too low for other lactic acid bacteria to grow.