Deck 22: The Proteobacteria

Question 1

Which of the following is true of Agrobacterium tumefaciens?

A)It is capable of nitrogen fixation.
B)It causes crown gall disease when it carries a tumor inducing (Ti)plasmid.
C)It can enter plants through unbroken leaf tissue.
D)All of the choices are true of Agrobacterium tumefaciens.

Answer 1

B

Question 2

Members of the genus Rhizobium

A)infect broad-leaved plants and cause crown gall disease.
B)are free living soil bacteria that fix nitrogen.
C)grow symbiotically in root nodules of legumes where they fix nitrogen.
D)are important nitrifying bacteria that convert nitrite to nitrate.

Answer 2

C

Question 3

An appendage that is an extension of the bacterial cell wall and plasma membrane is a(n)

A)flagellum.
B)prostheca.
C)pilus.
D)mycelium.

Answer 3

B

Question 4

Rickettsias are not:

A)able to use glucose as an energy source.
B)the cause of Rocky Mountain Spotted Fever.
C)obligate intracellular parasites.
D)all of the choices

Question 5

The purple nonsulfur bacteria

A)grow anaerobically as photoorganoheterotrophs.
B)utilize organic molecules as a source of electrons for photosynthesis.
C)typically can grow aerobically in the dark as chemoorganoheterotrophs.
D)all of the choices

Question 6

The stalk of Caulobacter increases in the surface area of the cell,which facilitates absorption of nutrients from nutrient poor environments.

Question 7

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

A)Agrobacterium
B)Rhizobium
C)Nitosomonas
D)Bacteroides

Question 8

The process of conversion of ammonia to nitrate is referred to as

A)nitrogen fixation.
B)nitrification.
C)ammonification.
D)denitrification.

Question 9

An organism that uses methane or methanol as its sole carbon and energy source is called a

A)methanogen.
B)methylotroph.
C)methanotroph.
D)methylogen.

Question 10

Rickettsias enter host cells by inducing _____________.

Question 11

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

Question 12

Which of the following best describes the photosynthetic membranes of the purple nonsulfur bacteria?

A)The photosynthetic membranes are attached to the plasma membrane but not continuous with it.
B)The photosynthetic membranes are not associated with the plasma membrane.
C)The photosynthetic membranes are continuous with the plasma membrane.
D)There are no photosynthetic membranes in the purple nonsulfur bacteria.

Question 13

Although discussed with the bacteria,Rickettsias are small obligate intracellular parasites and are therefore,more properly classified as viruses.

Question 14

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

Question 15

Most of the oligotrophic proteobacteria are found in the

A)alpha proteobacteria.
B)beta proteobacteria.
C)gamma proteobacteria.
D)delta proteobacteria.

Question 16

Members of the genus Rhizobium,when growing symbiotically within root nodule cells,are referred to as ______________.

Question 17

In the genus Caulobacter,asymmetric transverse fission produces a flagellated ________ cell that swims off but eventually settles,ejects its flagella,and forms a ____________ that adheres to surfaces.

Question 18

The class of proteobacteria that may be incorporated into the gamma proteobacteria is the

A)alpha proteobacteria.
B)beta proteobacteria.
C)delta proteobacteria.
D)epsilon proteobacteria.

Question 19

Species of the genus Hyphomicrobium are budding bacteria that attach to solid objects and are

A)found in marine and freshwater environments.
B)aerobic chemoheterotrophs.
C)able to reproduce by budding.
D)all of the choices

Question 20

Which of the following genera include bacteria with stalks?

A)Vibrio
B)Campylobacter
C)Caulobacter
D)Rhizobium

Question 21

Mineralization refers to

A)the breakdown of organic materials to inorganic materials.
B)the release of various minerals from ores.
C)the utilization of minerals as energy sources.
D)the incorporation of inorganic material into organic materials.

Question 22

Burkholderia cepacia and Pseudomonas aeruginosa can be a particular problem with

A)pneumonia patients.
B)decay of iron pipes under anaerobic conditions.
C)myasthenia gravis patients.
D)cystic fibrosis patients.

Question 23

A ___________ is a hollow tube-like structure that surrounds a chain of cells.

Question 24

Species of the genus Thiobacillus

A)oxidize inorganic sulfur compounds and produce ATP.
B)produce acids that leach metals out of ore.
C)are ubiquitous in soil,freshwater,and marine environments.
D)all of the choices

Question 25

Which of the following genera fix nitrogen nonsymbiotically?

A)Rhizobium
B)Nitrosomonas
C)Nitrobacter
D)Azotobacter

Question 26

Which of the following is/are true of the sheath of Leptothrix?

A)Attaches bacteria to surfaces.
B)May contain ferric and manganic oxides.
C)Helps protect against microbial predators.
D)All of the choices.

Question 27

Members of the genus Pseudomonas

A)are aerobes that mineralize a wide variety of organic compounds.
B)are obligate intracellular parasites.
C)form cysts when starved for nutrients.
D)perform anaerobic photosynthesis.

Question 28

The largest group of proteobacteria are the

A)alpha proteobacteria.
B)beta proteobacteria.
C)gamma proteobacteria.
D)delta proteobacteria.

Question 29

Bacteria that naturally exhibit bioluminescence have been found in which of the following genera?

A)Vibrio
B)Shigella
C)Pasteurella
D)Pseudomonas

Question 30

Members of the genus Salmonella are common causes of

A)gastroenteritis.
B)pneumonia.
C)meningitis.
D)urinary tract infections.

Question 31

The causative agent of cholera in humans is a member of the genus

A)Escherichia.
B)Vibrio.
C)Enterobacter.
D)Shigella.

Question 32

Members of the genus Neisseria cause which of the following human diseases?

A)gonorrhea
B)syphilis
C)genital herpes
D)diarrhea gastroenteritis

Question 33

Coxiella burnetii reproduces in the ______________ of a eukaryotic host cell.

A)cytoplasm
B)phagolysosome
C)nucleus
D)endoplasmic reticulum

Question 34

Sheaths of the bacterium Sphaerotilus are tubelike structures that are in intimate contact with the chain of cells that they enclose.

Question 35

Methylotrophic bacteria

A)are strict anaerobes.
B)use reduced one-carbon compounds as their main source of carbon.
C)are members of the Archaea based on 16S rRNA sequencing.
D)produce methane as a by-product of their metabolism.

Question 36

Coxiella burnetii is responsible for

A)Q-fever.
B)Rocky Mountain spotted fever.
C)Lyme disease.
D)Typhoid fever.

Question 37

Beggiatoa are

A)obligate aerobes.
B)facultative anaerobes.
C)microaerophiles.
D)obligate anaerobes.

Question 38

Which of the following organisms causes plague?

A)Bordetella pertussis
B)Yersinia pestis
C)Helicobacter pylori
D)Campylobacter jejuni

Question 39

Which of the following is not true about Methylococcus and Methylomonas?

A)They are strict anaerobes.
B)Most species are capable of forming cysts.
C)They contain complex arrays of intracellular membranes when using methane.
D)All of the choices are true about Methylococcus and Methylomonas.

Question 40

Whooping cough is caused by

A)Klebsiella pneumoniae.
B)Vibrio parahaemolyticus.
C)Bordetella pertussis.
D)Yersinia pestis.

Question 41

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

A)Yersinia.
B)Erwinia.
C)Proteus.
D)Shigella.

Question 42

Nautiliaceae are chemolithoautotrophs from deep-sea _________ vent ecosystems

Question 43

Methylotrophic bacteria generate ATP by oxidizing methane to methanol then to formaldehyde which is excreted.

Question 44

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

Question 45

Myxobacteria lyse bacteria and yeasts by secretion of digestive enzymes.They then use the resulting peptides and amino acids as a source of which of the following?

A)phosphate
B)nitrogen
C)iron
D)all of the choices

Question 46

The genus Bdellovibrio

A)form long filaments called trichomes.
B)prey on gram negative bacteria by becoming an intracellular parasite.
C)use reduced sulfur compounds as a source of energy.
D)are responsible for causing diarrhea in humans.

Question 47

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

A)The cytoplasm.
B)The nucleoid.
C)The space between the cell wall and plasma membrane.
D)The cell nucleus.

Question 48

Because of the similarity in cellular morphology among the Enterobacteriales,biochemical or genetic tests are needed for identification of particular genera and species.

Question 49

Filamentous microbial mats in anoxic,sulfide-rich cave springs are dominated by members of the

A)alpha proteobacteria.
B)beta proteobacteria.
C)delta proteobacteria.
D)epsilon proteobacteria.

Question 50

The enterobacteria in the order Enterobacteriales are readily distinguishable from one another by morphological criteria.

Question 51

Escherichia coli has not been found to be pathogenic in humans.

Question 52

Members of the order Desulfovibrionales use which of the following as electron acceptors during anaerobic respiration?

A)Elemental sulfur or sulfate.
B)O_2.
C)CO_2.
D)Organic acids and alcohols.

Question 53

The genus Desulfovibrio

A)is a strict anaerobe.
B)uses sulfate as a terminal electron acceptor during anaerobic respiration.
C)produces H₂S.
D)all of the choices

Question 54

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

Question 55

Campylobacter jejuni is the cause of

A)abortion in sheep and enteritis diarrhea in humans.
B)wilt disease in plants.
C)fowl cholera.
D)meningitis.

Question 56

Escherichia coli is a good indicator of fecal contamination of water supplies.

Question 57

Helicobacter pylori is responsible for

A)pneumonia.
B)cholera.
C)dysentery.
D)peptic ulcer disease.

Question 58

Members of the genus Thiothrix are sheathed bacteria that can replicate by releasing gonidia from the open end of the sheath.

Question 59

Most myxobacteria

A)are micropredators because they secrete digestive enzymes that lyse bacteria and yeasts.
B)have the ability to aggregate and form a fruiting body under conditions of nutrient limitation.
C)produce desiccation resistant dormant myxospores.
D)all of the choices