Microbiology Tortora 11th Edition Ch
11 & 12 Test Bank Questions and
Actual Answers 2025-2026.
Clostridium - Answer Gram-positive>Endospore-forming rod>Obligate anaerobe
Bacillus - Answer Gram-positive>Endospore-forming rod>Not obligate anaerobe
Streptomyces - Answer Gram-positive>Non-endospore-forming>Cells are rods>Produce
conidiospores
Mycobacterium - Answer Gram-positive>Non-endospore-forming>Cells are rods>Acid-fast
Streptococcus - Answer Gram-positive>Non-endospore-forming>Cells are cocci>Lack
cytochrome system
Staphylococcus - Answer Gram-positive>Non-endospore-forming>Cells are cocci>Use
aerobic respiration
Treponema - Answer Gram-negative>Cells are helical or curved>Axial filament
Spirillum - Answer Gram-negative>Cells are helical or curved>No axial filament
Pseudomonas - Answer Gram-negative>Cells are rods>Aerobic, nonfermenting
Escherichia - Answer Gram-negative>Cells are rods>Facultatively anaerobic
Mycoplasma - Answer Lack cell walls
Rickettsia - Answer Obligate intracellular parasites>Transmitted by ticks
Chlamydia - Answer Obligate intracellular parasites>Reticulate bodies in host cells
, Both are chemoheterotrophs capable of forming mycelia; some form conidia. Actinomycetes are
prokaryotes; fungi are eukaryotes. - Answer Compare and contrast: Actinomycetes and fungi
Both are large rod-shaped bacteria. Bacillus forms endospores, Lactobacillus is a fermentative
non-endospore-forming rod. - Answer Compare and contrast: Bacillus and Lactobacillus
Both are small rod-shaped bacteria. Pseudomonas has an oxidative metabolism; Escherichia is
fermentative. Pseudomonas has polar flagella; Escherichia has peritrichous flagella. - Answer
Compare and contrast: Pseudomonas and Escherichia
Both are helical bacteria. Leptospira (a spirochete) has an axial filament. Spirillum has flagella. -
Answer Compare and contrast: Leptospira and Spirillum
Both are gram-negative, rod-shaped bacteria. Escherichia are facultative anaerobes, and
Bacteroides are anaerobes. - Answer Compare and contrast: Escherichia and Bacteroides
Both are obligatory intracellular parasites. Rickettsia are transmitted by ticks; Chlamydia have a
unique developmental cycle. - Answer Compare and contrast: Rickettsia and Chlamydia
Both lack peptidoglycan cell walls. Ureaplasma are archaea; Mycoplasma are bacteria - Answer
Compare and contrast: Ureaplasma and Mycoplasma
- - Answer Draw a key to differentiate the following bacteria:
Cyanobacteria, Cytophaga, Desulfovibrio, Frankia, Hyphomicrobium,
Methanogens, Myxobacteria, Nitrobacter, purple
bacteria, Sphaerotilus, and Sulfolobus.w
Methanogens - Answer These organisms are important in sewage treatment
and can produce a fuel used for home heating and for generating
electricity.
gram-negative rods - Answer If you Gram-stained the bacteria that live in the human
intestine,
you would expect to find mostly
11 & 12 Test Bank Questions and
Actual Answers 2025-2026.
Clostridium - Answer Gram-positive>Endospore-forming rod>Obligate anaerobe
Bacillus - Answer Gram-positive>Endospore-forming rod>Not obligate anaerobe
Streptomyces - Answer Gram-positive>Non-endospore-forming>Cells are rods>Produce
conidiospores
Mycobacterium - Answer Gram-positive>Non-endospore-forming>Cells are rods>Acid-fast
Streptococcus - Answer Gram-positive>Non-endospore-forming>Cells are cocci>Lack
cytochrome system
Staphylococcus - Answer Gram-positive>Non-endospore-forming>Cells are cocci>Use
aerobic respiration
Treponema - Answer Gram-negative>Cells are helical or curved>Axial filament
Spirillum - Answer Gram-negative>Cells are helical or curved>No axial filament
Pseudomonas - Answer Gram-negative>Cells are rods>Aerobic, nonfermenting
Escherichia - Answer Gram-negative>Cells are rods>Facultatively anaerobic
Mycoplasma - Answer Lack cell walls
Rickettsia - Answer Obligate intracellular parasites>Transmitted by ticks
Chlamydia - Answer Obligate intracellular parasites>Reticulate bodies in host cells
, Both are chemoheterotrophs capable of forming mycelia; some form conidia. Actinomycetes are
prokaryotes; fungi are eukaryotes. - Answer Compare and contrast: Actinomycetes and fungi
Both are large rod-shaped bacteria. Bacillus forms endospores, Lactobacillus is a fermentative
non-endospore-forming rod. - Answer Compare and contrast: Bacillus and Lactobacillus
Both are small rod-shaped bacteria. Pseudomonas has an oxidative metabolism; Escherichia is
fermentative. Pseudomonas has polar flagella; Escherichia has peritrichous flagella. - Answer
Compare and contrast: Pseudomonas and Escherichia
Both are helical bacteria. Leptospira (a spirochete) has an axial filament. Spirillum has flagella. -
Answer Compare and contrast: Leptospira and Spirillum
Both are gram-negative, rod-shaped bacteria. Escherichia are facultative anaerobes, and
Bacteroides are anaerobes. - Answer Compare and contrast: Escherichia and Bacteroides
Both are obligatory intracellular parasites. Rickettsia are transmitted by ticks; Chlamydia have a
unique developmental cycle. - Answer Compare and contrast: Rickettsia and Chlamydia
Both lack peptidoglycan cell walls. Ureaplasma are archaea; Mycoplasma are bacteria - Answer
Compare and contrast: Ureaplasma and Mycoplasma
- - Answer Draw a key to differentiate the following bacteria:
Cyanobacteria, Cytophaga, Desulfovibrio, Frankia, Hyphomicrobium,
Methanogens, Myxobacteria, Nitrobacter, purple
bacteria, Sphaerotilus, and Sulfolobus.w
Methanogens - Answer These organisms are important in sewage treatment
and can produce a fuel used for home heating and for generating
electricity.
gram-negative rods - Answer If you Gram-stained the bacteria that live in the human
intestine,
you would expect to find mostly
