Verified Exam Solutions – Microbiology OpenStax
Edition
A bacterial chromosome is located in which of the following?
a.the nucleoid region
b.the nucleus
c.the thylakoids
d.the capsule - ✔️✔️correct answers-a.the nucleoid region
A bacterium possessing a tuft of flagella at one end of its cell is called
a.Lophotrichous
b.Peritrichous
c.Monotrichous
d.Amphitrichous - ✔️✔️correct answers-Lophotrichous
Acid-fast cell walls contain high concentrations of
a.peptidoglycan
b.teichoic acid
c.mycolic acid
d.pseudomurein - ✔️✔️correct answers-mycolic acid
All of the following are found in the cell walls of gram-positive bacteria EXCEPT
__________.
a.teichoic acid
b.peptidoglycan
c.lipoteichoic acid
d.lipid A - ✔️✔️correct answers-Lipid A
Bacteria divide by
a.binary fission
b.Mitosis
c.spore formation
,d.Budding - ✔️✔️correct answers-Bynary fission
Chemotaxis refers to the ability of microorganisms to __________.
a.survive under adverse conditions
b.attach to solid surfaces
c.move in a wavelike motion
d.move toward or away from chemical stimuli - ✔️✔️correct answers-move toward or
away from chemical stimuli
Elementary bodies are found in the phylum
a.Chlamydiae
b.Chloroflexi
c.Planctomycetes
d.Bacteroidetes - ✔️✔️correct answers-Chlamydiae
Enteric bacteria would most likely be found in which environment?
a.warm, tropical soil
b.intestinal tract of an animal
c.human skin
d.unpasteurized milk and apple juice - ✔️✔️correct answers-intestinal tract of an
animal
In chloroplasts, chlorophyll is contained in flattened sacs called
a.Cisternae
b.Vacuoles
c.Cristae
d.Thylakoids - ✔️✔️correct answers-Thylakoids
Peptic ulcers in humans are commonly caused by members of the genus
a.Shigella
b.Enterobacter
c.Helicobacter
d.Salmonella - ✔️✔️correct answers-helicobacter
Rickettsias differ from chlamydias in that only rickettsias
a.form spores
b.are intracellular parasites
c.are Gram-negative
d.require an arthropod for transmission - ✔️✔️correct answers-require an arthropod for
transmission
Spherical bacteria that divide and remain attached in chainlike patterns are called
__________.
a.Staphylococci
b.Tetrads
,c.Streptococci
d.Spirochetes - ✔️✔️correct answers-Streptococci
The two domains of prokaryotes are
a.Bacteria and Protista
b.Archaea and Fungi
c.Bacteria and Archaea
d.Bacteria and Fungi - ✔️✔️correct answers-Bacteria and Archaea
What are the sizes of two subunits used to compose prokaryotic ribosomes?
a.30S + 50S
b.30S + 40S
c.20S + 50S
d.40S + 60S - ✔️✔️correct answers-30S + 50S
Which is NOT true of the rickettsias?
a.They are classified as beta-proteobacteria
b.They are obligate intracellular parasites
c.They can cause human diseases often characterized by a rash
d.They are typically transmitted by insects and ticks - ✔️✔️correct answers-They are
classified as beta-proteobacteria
Which member of the gammaproteobacteria is a potential cause of pneumonia and can
be found in warm-water supply lines and air conditioning cooling towers?
a.Legionella
b.Klebsiella
c.Coxiella
d.Salmonella - ✔️✔️correct answers-Legionella
Which of the following genera is NOT a member of the phylum Actinobacteria?
a.Streptomyces
b.Lactobacillus
c.Propionibacterium
d.Mycobacterium - ✔️✔️correct answers-lactobacillus
Which of the following is NOT a member of the order Enterobacteriales?
a.Salmonella
b.Pseudomonas
c.Shigella
d.Escherichia - ✔️✔️correct answers-Pseudonomas
Which of the following is NOT an enteric?
a.Escherichia
b.Enterobacter
c.Campylobacter
, d.Salmonella - ✔️✔️correct answers-Campylobacter
Which of the following processes requires energy?
a.active transport
b.facilitated diffusion
c.simple diffusion
d.osmosis - ✔️✔️correct answers-Active transport
Which of the following statements is TRUE for prokaryotes?
a.They are multicellular organisms
b.They generally lack organelles (such as nuclei)
c.Their cell walls are chemically simple
d.Their DNA is associated with histone proteins - ✔️✔️correct answers-They generally
lack organelles (such as nuclei)
Which of the following structures allows a cell to survive adverse environmental
conditions?
a.Endospore
b.Carboxysome
c.Capsule
d.Gas vacuole - ✔️✔️correct answers-Endospore
Which one of the following is NOT a category of Archaea?
a.Halophiles
b.Low G + C gram-positive rods and cocci
c.Thermophiles
d.Acidophiles - ✔️✔️correct answers-Low G + C gram-positive rods and cocci
The word Bacillus may refer to
a. rod-shaped cells
b. spherical cells
c. rod-shaped cells and a specific genus
d. a specific genus - ✔️✔️correct answers-rod-shaped cells and a specific genus
Some bacteria stain gram-positive and others stain gram-negative because of
differences in the structure of their
a. capsule
b. endospore
c. cell wall
d. cell membrane - ✔️✔️correct answers-cell wall
The parasite that causes African sleeping sickness is
a. Amoeba proteus.
Edition
A bacterial chromosome is located in which of the following?
a.the nucleoid region
b.the nucleus
c.the thylakoids
d.the capsule - ✔️✔️correct answers-a.the nucleoid region
A bacterium possessing a tuft of flagella at one end of its cell is called
a.Lophotrichous
b.Peritrichous
c.Monotrichous
d.Amphitrichous - ✔️✔️correct answers-Lophotrichous
Acid-fast cell walls contain high concentrations of
a.peptidoglycan
b.teichoic acid
c.mycolic acid
d.pseudomurein - ✔️✔️correct answers-mycolic acid
All of the following are found in the cell walls of gram-positive bacteria EXCEPT
__________.
a.teichoic acid
b.peptidoglycan
c.lipoteichoic acid
d.lipid A - ✔️✔️correct answers-Lipid A
Bacteria divide by
a.binary fission
b.Mitosis
c.spore formation
,d.Budding - ✔️✔️correct answers-Bynary fission
Chemotaxis refers to the ability of microorganisms to __________.
a.survive under adverse conditions
b.attach to solid surfaces
c.move in a wavelike motion
d.move toward or away from chemical stimuli - ✔️✔️correct answers-move toward or
away from chemical stimuli
Elementary bodies are found in the phylum
a.Chlamydiae
b.Chloroflexi
c.Planctomycetes
d.Bacteroidetes - ✔️✔️correct answers-Chlamydiae
Enteric bacteria would most likely be found in which environment?
a.warm, tropical soil
b.intestinal tract of an animal
c.human skin
d.unpasteurized milk and apple juice - ✔️✔️correct answers-intestinal tract of an
animal
In chloroplasts, chlorophyll is contained in flattened sacs called
a.Cisternae
b.Vacuoles
c.Cristae
d.Thylakoids - ✔️✔️correct answers-Thylakoids
Peptic ulcers in humans are commonly caused by members of the genus
a.Shigella
b.Enterobacter
c.Helicobacter
d.Salmonella - ✔️✔️correct answers-helicobacter
Rickettsias differ from chlamydias in that only rickettsias
a.form spores
b.are intracellular parasites
c.are Gram-negative
d.require an arthropod for transmission - ✔️✔️correct answers-require an arthropod for
transmission
Spherical bacteria that divide and remain attached in chainlike patterns are called
__________.
a.Staphylococci
b.Tetrads
,c.Streptococci
d.Spirochetes - ✔️✔️correct answers-Streptococci
The two domains of prokaryotes are
a.Bacteria and Protista
b.Archaea and Fungi
c.Bacteria and Archaea
d.Bacteria and Fungi - ✔️✔️correct answers-Bacteria and Archaea
What are the sizes of two subunits used to compose prokaryotic ribosomes?
a.30S + 50S
b.30S + 40S
c.20S + 50S
d.40S + 60S - ✔️✔️correct answers-30S + 50S
Which is NOT true of the rickettsias?
a.They are classified as beta-proteobacteria
b.They are obligate intracellular parasites
c.They can cause human diseases often characterized by a rash
d.They are typically transmitted by insects and ticks - ✔️✔️correct answers-They are
classified as beta-proteobacteria
Which member of the gammaproteobacteria is a potential cause of pneumonia and can
be found in warm-water supply lines and air conditioning cooling towers?
a.Legionella
b.Klebsiella
c.Coxiella
d.Salmonella - ✔️✔️correct answers-Legionella
Which of the following genera is NOT a member of the phylum Actinobacteria?
a.Streptomyces
b.Lactobacillus
c.Propionibacterium
d.Mycobacterium - ✔️✔️correct answers-lactobacillus
Which of the following is NOT a member of the order Enterobacteriales?
a.Salmonella
b.Pseudomonas
c.Shigella
d.Escherichia - ✔️✔️correct answers-Pseudonomas
Which of the following is NOT an enteric?
a.Escherichia
b.Enterobacter
c.Campylobacter
, d.Salmonella - ✔️✔️correct answers-Campylobacter
Which of the following processes requires energy?
a.active transport
b.facilitated diffusion
c.simple diffusion
d.osmosis - ✔️✔️correct answers-Active transport
Which of the following statements is TRUE for prokaryotes?
a.They are multicellular organisms
b.They generally lack organelles (such as nuclei)
c.Their cell walls are chemically simple
d.Their DNA is associated with histone proteins - ✔️✔️correct answers-They generally
lack organelles (such as nuclei)
Which of the following structures allows a cell to survive adverse environmental
conditions?
a.Endospore
b.Carboxysome
c.Capsule
d.Gas vacuole - ✔️✔️correct answers-Endospore
Which one of the following is NOT a category of Archaea?
a.Halophiles
b.Low G + C gram-positive rods and cocci
c.Thermophiles
d.Acidophiles - ✔️✔️correct answers-Low G + C gram-positive rods and cocci
The word Bacillus may refer to
a. rod-shaped cells
b. spherical cells
c. rod-shaped cells and a specific genus
d. a specific genus - ✔️✔️correct answers-rod-shaped cells and a specific genus
Some bacteria stain gram-positive and others stain gram-negative because of
differences in the structure of their
a. capsule
b. endospore
c. cell wall
d. cell membrane - ✔️✔️correct answers-cell wall
The parasite that causes African sleeping sickness is
a. Amoeba proteus.
