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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

F) D) and E)
G) A) and B)

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Regular clusters of cocci that resemble a square are called __________.

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Cocci can be spherical as well as kidney-shaped.

A) True
B) False

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

A) True
B) False

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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

F) A) and C)
G) D) and E)

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The genus of pathogenic cocci responsible for a wide range of human disease and whose members grow in chains is ___________. (Be sure your answer is italicized.)

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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

F) None of the above
G) D) and E)

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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

F) None of the above
G) A) and D)

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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

F) B) and D)
G) A) and E)

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


A) Burkholderia
B) Thiobacillus
C) Neisseria
D) Zoogloea
E) Nitrosomonas

F) B) and D)
G) B) and C)

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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

F) D) and E)
G) C) and E)

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The ___________ are a group of Gram-positive bacteria that form branching filaments resembling those of fungi.

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

A) True
B) False

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The "giant" bacterium Epulopiscium reproduces by means of


A) binary fission.
B) snapping division.
C) budding.
D) sexual reproduction.
E) viviparity.

F) B) and C)
G) All of the above

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Listeria is responsible for


A) gastric ulcers.
B) contaminated milk and meat.
C) urinary tract infections.
D) tuberculosis.
E) "flesh-eating" bacterial infections.

F) A) and E)
G) B) and D)

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