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1) Pleomorphic bacteria
A) have a slightly curved rod shape.
B) are flexible.
C) reproduce by snapping division.
D) are roughly spherical.
E) vary in size and shape.
2) Which of the following bacterial arrangements is the result of snapping division?
A) tetrads
B) palisades
C) strepto-
D) sarcinae
E) staphylo-
3) Which of the following is NOT associated with Corynebacterium?
A) palisades
B) Gram-negative
C) binary fission
D) diphtheria
E) snapping division
4) What bacterial structure is responsible for separating the daughter DNA molecules after replication?
A) cross wall
B) cytoplasmic membrane
C) fimbria
D) spindle
E) cytoskeleton
5) Endospores
A) are bacterial reproductive structures.
B) can be produced when nutrients are scarce.
C) are produced by bacteria, algae, and fungi.
D) are resistant to everything except radiation.
E) can last for only about 100 years.
6) Bergey\'s Manual contains
A) classification schemes for prokaryotes.
B) treatments for bacterial diseases.
C) recipes for bacterial growth media.
D) genetic sequences of prokaryotes.
E) rules for naming new bacterial species
7) Which of the following characteristics does NOT distinguish the archaea from the bacteria?
A) the types of transfer RNA used
B) the rRNA sequences present
C) the deoxyribonucleotides
D) cell wall composition
E) cell membrane composition
8) The archaea known as halophiles
A) require temperatures above 45C to survive.
B) require salt concentrations of 9% or greater to survive.
C) are members of the phylum Euryarchaeota.
D) are members of the Euryarchaeota and require temperatures above 45C.
E) are members of the Euryarchaeota and require salt concentrations above 9%.
9) The largest known group of archaea is the
A) thermophiles.
B) halophiles.
C) cyanobacteria.
D) methanogens.
E) hyperthermophiles.
10) Which of the following types of microbes might be found in the Dead Sea?
A) hyperthermophiles
B) phototrophic bacteria
C) methanogens
D) actinomycetes
E) halophiles
11) Which of the following groups of bacteria lives in environments similar to those that may have existed on the early Earth?
A) deeply branching bacteria
B) cyanobacteria
C) mycoplasmas
D) thermophiles
E) proteobacteria
12) Which of the following statements regarding cyanobacteria is FALSE?
A) They are oxygenic.
B) Many perform nitrogen fixation.
C) They contain chlorophyll a.
D) They may have given rise to mitochondria.
E) Some are motile.
13) Heterocysts are associated with
A) mycoplasmas.
B) alphaproteobacteria.
C) cyanobacteria.
D) myxobacteria.
E) chlamydias.
14) Low G + C Gram-positive bacteria are
A) Mycoplasma.
B) in the phylum Firmicutes.
C) Clostridia.
D) in the phylum Actinobacteria.
E) in the phylum Firmicutes and include Clostridia and Mycoplasma.
15) Which of the following diseases is NOT associated with clostridia?
A) tetanus
B) diarrhea
C) gangrene
D) botulism
E) diphtheria
16) Mycoplasmas are pleomorphic because they
A) have no cell walls.
B) are low G + C Gram-positive bacteria.
C) exhibit snapping division.
D) have sterols in their cytoplasmic membranes.
E) produce endospores.
17) Which of the following bacterial genera produce(s) endospores?
A) Bacillus
B) Clostridium
C) Lactobacillus
D) both Bacillus and Lactobacillus
E) 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?
A) Staphylococcus
B) Listeria
C) Lactobacillus
D) Mycobacterium
E) Corynebacterium
19) Which of the following groups of bacteria is named for its resemblance to fungi?
A) Corynebacterium
B) Actinomyces
C) Clostridium
D) Lactobacillus
E) Staphylococcus
20) Which of the following bacterial genera is used for the degradation of environmental pollutants?
A) Actinomyces
B) Streptomyces
C) Corynebacterium
D) Rhizobium
E) Nocardia
21) Which of the following is NOT associated with bacteria in the genus Streptomyces?
A) the \"musty\" smell of soil
B) nutrient recycling in soil
C) antibiotic production
D) microbial antagonism
E) protection of plants against caterpillars
22) Which of the following characteristics is the basis for distinguishing classes of proteobacteria?
A) outer membrane carbohydrates
B) cell wall structure
C) G + C ratio
D) ribosomal RNA sequences
E) cytoplasmic membrane lipid composition
23) Proteobacteria, which are facultative anaerobes commonly found in mammalian intestines, are members of the
A) alphaproteobacteria.
B) betaproteobacteria.
C) gammaproteobacteria.
D) deltaproteobacteria.
E) epsilonproteobacteria.
24) Members of which of the following genera are the most common sexually transmitted bacteria in the United States?
A) Bacteroides
B) Rickettsia
C) Chlamydia
D) Helicobacter
E) Treponema
25) Which of the following genera does NOT include intracellular parasites of other cells?
A) Bdellovibrio
B) Chlamydia
C) Rickettsia
D) Borrelia
E) Legionella
26) Unusual cellular extensions called prosthecae are associated with which of the following groups of proteobacteria?
A) alpha
B) beta
C) gamma
D) delta
E) epsilon
27) Which of the following bacterial genera plays an important role in environmental nitrogen cycles?
A) Nitrobacter
B) Rhizobium
C) Azospirillum
D) both Nitrobacter and Rhizobium
E) Nitrobacter, Rhizobium, and Azospirillum
28) Microbes growing in boiling hot mineral springs are generally
A) methanogens.
B) halophiles.
C) hyperthermophiles.
D) purple sulfur bacteria.
E) cyanobacteria.
29) Classification of bacteria into different phyla is based on comparisons involving which of the following?
A) DNA sequences
B) cell wall composition
C) protein sequences
D) both DNA and protein sequences
E) DNA and protein sequences, as well as cell wall composition
30) Bacteria that require hydrogen sulfide are generally members of the A) green phototrophic bacteria. B) cyanobacteria. C) halophiles. D) methanogens. E) thermophiles
31) Which of the following statements regarding pseudomonads is FALSE?
A) They are Gram-negative rods.
B) They are symbiotic with plants for nitrogen fixation.
C) They often contaminate food products.
D) They include Pseudomonas and Azotobacter.
E) They cause urinary tract infections.
32) Which of the following bacterial genera is useful for sewage treatment? A) Burkholderia B) Thiobacillus C) Neisseria D) Zoogloea E) Nitrosomonas
33) A flexible, spiral-shaped bacterium is called a
A) spirochete.
B) vibrio.
C) coccobacillus.
D) spirillum.
E) sarcina.
34) The \"giant\" bacterium Epulopiscium reproduces by means of
A) binary fission.
B) snapping division.
C) budding.
D) sexual reproduction.
E) viviparity.
35) Which of the following statements regarding mycoplasmas is FALSE? A) They are low G + C bacteria. B) They stain Gram-positive. C) They are pleomorphic. D) They exhibit a \"fried egg\" appearance on solid media. E) They are the smallest free-living cells.
36) The anaerobic Clostridium species are troublesome pathogens largely because of their capacity for
A) endospore production.
B) rapid reproduction.
C) oxygen production.
D) biofilm production.
E) high salt tolerance.
37) Prokaryotes of the genus Pyrodictium are
A) endospore formers.
B) intracellular parasites.
C) members of the deeply branching bacteria.
D) halophiles.
E) thermophiles.
38) The __________ include the genus Aquifex. A) archaea B) proteobacteria C) deeply branching bacteria D) high G + C Gram-positive bacteria E) clostridia
39) The bacterium Bacillus cereus is A) an endospore former. B) a frequent contaminant of milk and meat. C) responsible for food poisoning from rice. D) the cause of gastric ulcers. E) an endospore former responsible for food poisoning from rice.
40) Listeria is responsible for
A) gastric ulcers.
B) contaminated milk and meat.
C) urinary tract infections.
D) tuberculosis.
E) \"flesh-eating\" bacterial infections.
41) One species of the genus Streptococcus is the leading cause of
A) tuberculosis.
B) urinary tract infections.
C) contaminated milk and meat.
D) \"flesh-eating\" bacterial infections.
E) food poisoning from rice.
42) The genus Mycobacterium includes species responsible for
A) tuberculosis.
B) urinary tract infections.
C) food poisoning from contaminated dairy products.
D) gastric ulcers.
E) food poisoning from rice.
43) The genus Helicobacter is responsible for
A) food poisoning from contaminated meat.
B) food poisoning from rice.
C) gastric ulcers.
D) tuberculosis.
E) urinary tract infections.
44) Members of the genus Chlamydia are
A) thermophiles.
B) intracellular parasites.
C) classified with the deeply branching bacteria.
D) endospore-formers.
E) Gram-positive bacteria.
45) Pseudomonas species are occasional causes of A) food poisoning from contaminated meat. B) food poisoning from rice. C) food poisoning from dairy products. D) \"flesh-eating\" bacterial infection. E) urinary tract infections.
1) The majority of archaea are extremophiles.
2) When an endospore germinates, it gives rise to two daughter cells called vegetative cells.
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.
4) Halophiles grow equally well in the presence or absence of high salt concentrations.
5) Cyanobacteria contain chlorophyll a and carry out anoxygenic photosynthesis.
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