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Microbiology Chapter 11 potential test questions

front 1

All prokaryotes reproduce sexually.

back 1

false - asexually

front 2

A bacillus is a bacterium with a slightly curved rod shape.

back 2

false - vibrio

front 3

If you were to view staphylococci, you should expect to see clusters of cells.

back 3

true

front 4

Chlamydias have peptidoglycan cell walls.

back 4

false - lack

front 5

Archaea are classified into phyla based primarily on tRNA sequences.

back 5

false - rRna

front 6

Halophiles inhabit extremely saline habitats such as the Great Salt Lake.

back 6

true

front 7

Pigments located in the thylakoids in the phototrophic bacteria trap light energy for metabolic processes.

back 7

true

front 8

Most cyanobacteria form heterocysts in which nitrogen fixation occurs.

back 8

true

front 9

A giant bacterium that is large enough to be seen without a microscope is Selenomonas.

back 9

false - epulopiscium

front 10

When environmental nutrients are depleted, myxobacteria aggregate in mounts to form fruiting bodies.

back 10

true

front 11

The type of reproduction in prokaryotes that results in palisade arrangement of cells is called ___________________.

  1. pleomorphic division
  2. endospore formation
  3. snapping division
  4. binary fission

back 11

c. snapping division

front 12

The thick-walled reproductive spores produced in the middle of cyanobacterial filaments are called ______________________.

  1. akinetes
  2. terminal endospores
  3. metachromatic granules
  4. heterocysts

back 12

a. akinetes

front 13

Which of the following terms best describes stiff, spiral shaped prkaryotic cells?

  1. cocci
  2. bacilli
  3. spirilla
  4. spirochetes

back 13

c. spirilla

front 14

Endospores _________.

  1. can remain alive for decades.
  2. can remain alive in boiling water
  3. exist in a state of suspended animation
  4. all of the above

back 14

d. all of the above

front 15

How is halobacterium salinarium distinctive?

  1. It is absolutely dependent on high salt concentrations to maintain its cell wall.
  2. It is found in terrestrial volcanic habitats
  3. It photosynthesizes without chlorophyll
  4. It can survive 5 million rad of radiation

back 15

a. it is absolutely dependent on high salt concentrations to maintain its cell wall.

front 16

Photosynthetic bacteria that also fix nitrogen are _______________.

  1. mycoplasmas
  2. spirilla
  3. bacteroids
  4. cyanobacteria

back 16

d. cyanobacteria

front 17

Which genus is the most common anaerobic human pathogen?

  1. Bacteroides
  2. Spirochetes
  3. Chlamydia
  4. Methanopyrus

back 17

a. Bacteroides

front 18

Flexible spiral shaped prokaryotes are _______________.

  1. spirilla
  2. spirochetes
  3. vibrios
  4. rickettsias

back 18

b. spirochetes

front 19

Bacteria that convert nitrogen gas into ammonia are _____________.

  1. nitrifying bacteria
  2. nitrogenous
  3. nitrogen fixers
  4. nitrification bacteria

back 19

c. nitrogen fixers

front 20

The presence of mycolic acid in the cell wall characterizes ____________.

  1. Corynebacterium
  2. Listeria
  3. Nocardia
  4. Mycobacterium

back 20

d. Mycobacterium