CH11 Quiz

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1) Pleomorphic bacteria

vary in size and shape.

2) Which of the following bacterial arrangements is the result of snapping division?

palisades

3) Which of the following is NOT associated with Corynebacterium?

Gram Negative

4) What bacterial structure is responsible for separating the daughter DNA molecules after replication?

cytoplasmic membrane

5) Endospores

can be produced when nutrients are scarce.

6) Bergey's Manual contains

classification schemes for prokaryotes.

7) Which of the following characteristics does NOT distinguish the archaea from the bacteria?

the deoxyribonucleotides

8) The archaea known as halophiles

are members of the Euryarchaeota and require salt concentrations above 9%.

9) The largest known group of archaea is the

methanogens.

10) Which of the following types of microbes might be found in the Dead Sea?

halophiles

11) Which of the following groups of bacteria lives in environments similar to those that may have existed on the early Earth?

deeply branching bacteria

12) Which of the following statements regarding cyanobacteria is FALSE?

They may have given rise to mitochondria.

13) Heterocysts are associated with

Cyanobacteria

14) Low G + C Gram-positive bacteria are

in the phylum Firmicutes and include Clostridia and Mycoplasma

15) Which of the following diseases is NOT associated with clostridia?

diphtheria

16) Mycoplasmas are pleomorphic because they

have no cell walls

17) Which of the following bacterial genera produce(s) endospores?

both Bacillus and Clostridium

18) Which of the following bacterial genera includes species that protect areas of the body such as the intestinal tract and the vagina from invasion by pathogens?

lactobacillus

19) Which of the following groups of bacteria is named for its resemblance to fungi?

actinomyces

20) Which of the following bacterial genera is used for the degradation of environmental pollutants?

Nocardia

21) Which of the following is NOT associated with bacteria in the genus Streptomyces?

protection of plants against caterpillars

22) Which of the following characteristics is the basis for distinguishing classes of proteobacteria?

ribosomal RNA sequences

23) Proteobacteria, which are facultative anaerobes commonly found in mammalian intestines, are members of the

gammaproteobacteria.

24) Members of which of the following genera are the most common sexually transmitted bacteria in the United States?

Chlamydia

25) Which of the following genera does NOT include intracellular parasites of other cells?

Borrelia

26) Unusual cellular extensions called prosthecae are associated with which of the following groups of proteobacteria?

alpha

27) Which of the following bacterial genera plays an important role in environmental nitrogen cycles?

Nitrobacter, Rhizobium, and Azospirillum

28) Microbes growing in boiling hot mineral springs are generally

hyperthermophiles

29) Classification of bacteria into different phyla is based on comparisons involving which of the following?

both DNA and protein sequence

30) Bacteria that require hydrogen sulfide are generally members of the

green phototrophic bacteria.

31) Which of the following statements regarding pseudomonads is FALSE?

They are symbiotic with plants for nitrogen fixation

32) Which of the following bacterial genera is useful for sewage treatment?

Zoogloea

33) A flexible, spiral-shaped bacterium is called a

spirochete.

34) The "giant" bacterium Epulopiscium reproduces by means of

viviparity.

35) Which of the following statements regarding mycoplasmas is FALSE?

They stain Gram-positive.

36) The anaerobic Clostridium species are troublesome pathogens largely because of their capacity for

endospore production

37) Prokaryotes of the genus Pyrodictium are

thermophiles

38) The __________ include the genus Aquifex.

deeply branching bacteria

39) The bacterium Bacillus cereus is

an endospore former responsible for food poisoning from rice.

40) Listeria is responsible for

contaminated milk and meat.

41) One species of the genus Streptococcus is the leading cause of

"flesh-eating" bacterial infections.

42) The genus Mycobacterium includes species responsible for

tuberculosis

43) The genus Helicobacter is responsible for

gastric ulcers.

44) Members of the genus Chlamydia are

intracellular parasites.

45) Pseudomonas species are occasional causes of

urinary tract infections.

1) The majority of archaea are extremophiles.

false

2) When an endospore germinates, it gives rise to two daughter cells called vegetative cells.

false

3) Members of the Streptomyces are environmentally important because they can degrade a wide range of compounds including lignin from trees, chitin and keratin from animals, and latex.

true

4) Halophiles grow equally well in the presence or absence of high salt concentrations.

false

5) Cyanobacteria contain chlorophyll a and carry out anoxygenic photosynthesis.

false

6) Cocci can be spherical as well as kidney-shaped.

true

7) Some strains of Staphylococcus aureus can invade the body and cause diseases such as pneumonia and bacteremia.

true

8) Mycoplasmas are named for the large quantities of mycolic acid in their cell walls.

false

9) Most of the methane produced by methanogens is oxidized by other types of bacteria before it affects the Earth's climate.

true

10) Myxobacteria exhibit traits, such as cooperation and differentiation, that are not normally observed in prokaryotes.

true

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