Section 11.1 – The Prokaryotes: Domains Bacteria and Archaea

Correctly match each organism with its mode of motility.

Gliding motility-Motile cyanobacteria

Axial filaments-Spirochetes

Flagella-Bacillus

Swarming-Proteus

Enteric bacteria would most likely be found in which environment?

Intestinal tract of an animal

Which member of the gammaproteobacteria may potentially cause pneumonia and can be found in warm-water supply lines and air-conditioning cooling towers?

Legionella

Enterics are __________.

gram-negative facultative anaerobes that are found in the intestines of animals

Which answers are true of bacterial photosynthesis and/or photosynthetic bacteria?

Cyanobacteria carry out the photosynthetic process similar to the way plants and algae do.

Green nonsulfur bacteria use organic compounds as the source of electrons for reduction of carbon dioxide.

Some photosynthetic bacteria are also capable of chemoheterotrophic growth.

Some photosynthetic bacteria are anaerobes.

Which of the following bacteria can fix nitrogen?

Azospirillum

Azotobacter

Some cyanobacteria

Rhizobium

Which of the following statements is NOT true for Pelagibacter?

Pelagibacter's photosynthetic capability makes it a key producer in marine ecosystems.

Which of these bacteria are associated with foodborne illness?

Campylobacter

Shigella

Salmonella

Staphylococcus

Which disease is caused by a bacterium that does NOT have peptidoglycan in its cell wall?

Rheumatic fever

Salmonellosis

Cholera

Rocky Mountain spotted fever

Which of the following statements are true of the Genus Mycoplasma?

They are genetically related to gram-positive bacteria.

They are highly pleomorphic.

They are unusually small bacteria.

They may produce filaments that resemble fungi.

Why are cyanobacteria classified as bacteria, rather than algae?

They are prokaryotic cells.

Which of the following statements concerning Pseudomonas is true?

The bacteria can metabolize a wide variety of substrates.

Azospirillum, Azotobacter, and Azomonas share which of the following?

Nitrogen-fixing ability

Why is Burkholderia a frequent cause of nosocomial infections?

It grows on unusual carbon sources and some antiseptics.

Erwinia bacteria produce an enzyme that breaks down pectin. You would expect Erwinia to cause diseases in which type of organism?

plants

Which group of bacteria is known for containing organisms that are predators on other bacteria?

Deltaproteobacteria

Rickettsias are different from most other bacteria in that they __________.

are obligate intracellular parasites

All of the following may have filamentous growth EXCEPT __________.

Borrelia

A bacterium isolated from the soil has the following characteristics: it is a gram-negative straight rod, it is aerobic and motile, it produces water-soluble pigment, and it readily grows on several common laboratory media. Ribosomal RNA analysis places this bacterium with the gammaproteobacteria. This organism is most likely in the genus __________.

Pseudomonas

Borrelia, the causative agent of Lyme disease, is a spirochete similar to the causative agent of syphilis, Treponema. Both bacteria __________.

have axial filaments

A new microorganism has been discovered that resides in the mouths of dogs. This microorganism lacks a nucleus, has a cell wall consisting of peptidoglycan and an outer membrane of lipopolysaccharide, is shaped like a corkscrew, and is motile by means of an axial filament. This organism is most likely related to __________.

spirochaetes