Exam 22: The Proteobacteria

Which of the following genera grow symbiotically within root nodules of legumes as nitrogen-fixing bacteroids?

In M.xanthus,_______ motility is a kind of twitching that is governed by the production of retractable type IV pili,only observed when cells are in a group. or or

Beggiatoa are ______.

Rickettsia species are unable to use glucose as a carbon and energy source,but can use glutamate or succinate.

Rickettsias enter host cells by inducing ______.

M.xanthus has an alternate motility type,known as _______ motility,because it is exhibited by single cells that leave the group,perhaps scouting for prey and requires a multiprotein motility "machine." or or

Haemophilus influenzae type b is a causative agent of meningitis in children.

Sulfur-oxidizing bacteria obtain ATP via as an electron acceptor.

Caulobacter is a genus of bacteria with a unique cell division cycle that yields two morphologically distinct cell types.

Desulfuromonaceae and Geobacteraceae are strict anaerobic mesophilic bacteria and have been isolated from anoxic _______ environments.

Although Epsilonproteobacteria make up the smallest of the five proteobacterial classes,species such as Helicobacter and Campylobacter are responsible for significant human disease that range from mild to severe.

In which of the following regions in the host bacterium are you most likely to find Bdellovibrio?

Coxiella burnetii is responsible for ______.

Biochemical tests are no longer very important for the identification of enteric bacteria.

The genus Bdellovibrio

In an electron transport chain capable of dissimilatory sulfate reduction,the oxidation of sulfate to sulfide requires to form APS.

A genus in the family Enterobacteriaceae that is a major pathogen of crop plants is ______.

An example of purple photosynthetic bacteria metabolic flexibility is seen in Rhodospirillum rubrum using a "decision-making" process; in oxic conditions,the bacterium uses fermentation,photoheterotrophy,or photoautotrophy versus when oxygen is not present that the photosynthetic apparatus is used to grow chemoorganotrophically.

Members of the genus Rhizobium

A ______ is a hollow tubelike structure that surrounds a chain of cells.