Page 1 of 32
“MICROBIOLOGY EXAM QUESTIONS”LATEST EXAM
SOLVED QUESTIONS & ANSWERS VERIFIED 100%
GRADED A+ (latest version) well revised guarantee pass
exam microbiology
Bergey’s Manual of Systematic Bacteriology differs from Bergey’s Manual of
Determinative Bacteriology in that the former
a. groups bacteria into species.
b. groups bacteria according to phylogenetic relationships.
c. groups bacteria according to pathogenic properties.
d. groups bacteria into 19 species.
e. all of the above
b. groups bacteria according to phylogenetic relationships.
Bacillus and Lactobacillus are not in the same order. This indicates that which
one of the following is not sufficient to assign an organism to a taxon?
a. biochemical characteristics
b. amino acid sequencing
c. phage typing
d. serology
e. morphological characteristics
e. morphological characteristics
Rickettsias differ from chlamydias in that rickettsias
a. are gram-negative
b. require an arthropod for transmission
c. are intracellular parasites
d. form elementary bodies
e. are enteric
b. require an arthropod for transmission
Which one of the following bacteria does NOT belong with the other
betaproteobacteria?
a. Burkholderia
b. Neisseria
c. Salmonella
d. Acidithiobacillus
e. Bordetella
c. Salmonella
, Page 2 of 32
Streptomyces differs from Actinomyces because Streptomyces
a. is a bacterium
b. is an archaea
c. is a strict aerobe
d. forms filaments
e. produces conidia
c. is a strict aerobe
Members of which group or genus of Archaea are part of the microbiota of the
human colon, vagina, and mouth?
a. Pyrodictium
b. Sulfolobus
c. Halophiles
d. Methanogens
d. Methanogens
If a patient is diagnosed with a peptic ulcer, which genus of proteobacteria is
probably responsible?
a. Myxococcus
b. Desulfovibrio
c. Helicobacter
d. Campylobacter
c. Helicobacter
All of the following bacteria are motile. Which does NOT have flagella?
a. Salmonella
b. Pseudomonas
c. Spirillium
d. Escherichia
e. spirochetes
e. spirochetes
Which of the following is NOT a characteristic of Neisseria?
a. requires X and V factors
b. cocci
c. gram-negative
d. aerobic
e. Some species are human pathogens.
a. requires X and V factors
Which one of the following bacteria does NOT belong with the others?
a. Escherichia
b.Lactobacillus
c. Staphylococcus
d. Streptococcus
e. Bacillus
a. Escherichia
You have isolated and grown a pure culture of a prokaryotic cell type. The first
step in identification is a(n)
a. flagella stain
b. DNA fingerprint
c. endospore stain
, Page 3 of 32
d. gram stain
e. lactose fermentation test
d. gram stain
The characteristic most notable regarding the mycoplasmas is that they
a. carry out fermentative metabolism
b. are aerotolerant
c. lack cell walls
d. are nonpathogenic
e. produce endospores
c. lack cell walls
A primary difference between cyanobacteria and purple and green
photosynthesizing bacteria is
a. electron donor for CO2 reduction
b. cell type
c. color
d. energy source
e. cell wall type
a. electron donor for CO2 reduction
If a typhoid fever outbreak has occurred, which of the following statements is
true?
a. Escherichia coli is present, probably passed on by infected human waste in
the water supply.
b. Salmonella is present, and the serovars may be differentiated by antigenic
analysis.
c. Shigella species are present and may have been transmitted by cattle.
d. Proteus species are probably present.
b. Salmonella is present, and the serovars may be differentiated by antigenic
analysis.
Which of the following form conidiospores?
a. actinomycetes and related organisms
b. spiral and curved bacteria
c. rickettsias
d. anaerobic gram-negative cocci
e. endospore-forming gram-positive rods and cocci
a. actinomycetes and related organisms
Which gammaproteobacteria are facultatively anaerobic, Gram-negative rods
that inhabit the intestinal tracts of humans and other animals?
a. vibrionales
b. pseudomonadales
c. enterobacteriales
d. leionellales
c. enterobacteriales
Blood agar would be the culture medium of choice if one were testing a patient
for which of the following?
a. actinomycosis
, Page 4 of 32
b. food poisoning
c. scarlet fever
d. tuberculosis
c. scarlet fever
You have isolated a gram-positive bacterium with low G + C content from
unpasteurized milk. It infected a pregnant woman, and now you are worried
that her child will be stillborn. What bacterium is it?
a. Listeria monocytogenes
b. Clostridium
c. Anabaena
d. Mycobacterium
Listeria monocytogenes
- associated with dairy products
- can cause stilbirth
Which one of the following does NOT belong with the others?
a. Bartonella
b. Staphylococcus
c. Rickettsia
d. Wolbachia
e. Ehrilchia
b. Staphylococcus
Gram-positive organisms with high G+C content are in the phylum
__________.
a. Proteobacteria
b. Spirochaetes
c. Actinobacteria
d. Firmicutes
c. Actinobacteria
Which of the following factors is believed to limit the size of most bacterial
cells?
a. the availability of nitrogen in the environment
b. the fact that nutrients must enter the cells by simple diffusion
c. the ability to acquire oxygen for cell respiration
d. the availability of carbon in the environment
b. the fact that nutrients must enter the cells by simple diffusion
Which of the following photosynthetic bacteria carries out oxygenic
photosynthesis and most likely altered Earth's atmosphere by significantly
contributing to the accumulation of oxygen gas?
a. Cyanobacteria, such as Anabaena and Prochlorococcus
b. Green nonsulfur bacteria such as Chloroflexus.
c. Green sulfur bacteria such as Chlorobium
d. Purple sulfur bacteria
a. Cyanobacteria, such as Anabaena and Prochlorococcus
Which of the following genera can be described as a non-motile aerobic gram
negative rod?
a. Staphylococcus
b. Treponema
c. Neisseria
“MICROBIOLOGY EXAM QUESTIONS”LATEST EXAM
SOLVED QUESTIONS & ANSWERS VERIFIED 100%
GRADED A+ (latest version) well revised guarantee pass
exam microbiology
Bergey’s Manual of Systematic Bacteriology differs from Bergey’s Manual of
Determinative Bacteriology in that the former
a. groups bacteria into species.
b. groups bacteria according to phylogenetic relationships.
c. groups bacteria according to pathogenic properties.
d. groups bacteria into 19 species.
e. all of the above
b. groups bacteria according to phylogenetic relationships.
Bacillus and Lactobacillus are not in the same order. This indicates that which
one of the following is not sufficient to assign an organism to a taxon?
a. biochemical characteristics
b. amino acid sequencing
c. phage typing
d. serology
e. morphological characteristics
e. morphological characteristics
Rickettsias differ from chlamydias in that rickettsias
a. are gram-negative
b. require an arthropod for transmission
c. are intracellular parasites
d. form elementary bodies
e. are enteric
b. require an arthropod for transmission
Which one of the following bacteria does NOT belong with the other
betaproteobacteria?
a. Burkholderia
b. Neisseria
c. Salmonella
d. Acidithiobacillus
e. Bordetella
c. Salmonella
, Page 2 of 32
Streptomyces differs from Actinomyces because Streptomyces
a. is a bacterium
b. is an archaea
c. is a strict aerobe
d. forms filaments
e. produces conidia
c. is a strict aerobe
Members of which group or genus of Archaea are part of the microbiota of the
human colon, vagina, and mouth?
a. Pyrodictium
b. Sulfolobus
c. Halophiles
d. Methanogens
d. Methanogens
If a patient is diagnosed with a peptic ulcer, which genus of proteobacteria is
probably responsible?
a. Myxococcus
b. Desulfovibrio
c. Helicobacter
d. Campylobacter
c. Helicobacter
All of the following bacteria are motile. Which does NOT have flagella?
a. Salmonella
b. Pseudomonas
c. Spirillium
d. Escherichia
e. spirochetes
e. spirochetes
Which of the following is NOT a characteristic of Neisseria?
a. requires X and V factors
b. cocci
c. gram-negative
d. aerobic
e. Some species are human pathogens.
a. requires X and V factors
Which one of the following bacteria does NOT belong with the others?
a. Escherichia
b.Lactobacillus
c. Staphylococcus
d. Streptococcus
e. Bacillus
a. Escherichia
You have isolated and grown a pure culture of a prokaryotic cell type. The first
step in identification is a(n)
a. flagella stain
b. DNA fingerprint
c. endospore stain
, Page 3 of 32
d. gram stain
e. lactose fermentation test
d. gram stain
The characteristic most notable regarding the mycoplasmas is that they
a. carry out fermentative metabolism
b. are aerotolerant
c. lack cell walls
d. are nonpathogenic
e. produce endospores
c. lack cell walls
A primary difference between cyanobacteria and purple and green
photosynthesizing bacteria is
a. electron donor for CO2 reduction
b. cell type
c. color
d. energy source
e. cell wall type
a. electron donor for CO2 reduction
If a typhoid fever outbreak has occurred, which of the following statements is
true?
a. Escherichia coli is present, probably passed on by infected human waste in
the water supply.
b. Salmonella is present, and the serovars may be differentiated by antigenic
analysis.
c. Shigella species are present and may have been transmitted by cattle.
d. Proteus species are probably present.
b. Salmonella is present, and the serovars may be differentiated by antigenic
analysis.
Which of the following form conidiospores?
a. actinomycetes and related organisms
b. spiral and curved bacteria
c. rickettsias
d. anaerobic gram-negative cocci
e. endospore-forming gram-positive rods and cocci
a. actinomycetes and related organisms
Which gammaproteobacteria are facultatively anaerobic, Gram-negative rods
that inhabit the intestinal tracts of humans and other animals?
a. vibrionales
b. pseudomonadales
c. enterobacteriales
d. leionellales
c. enterobacteriales
Blood agar would be the culture medium of choice if one were testing a patient
for which of the following?
a. actinomycosis
, Page 4 of 32
b. food poisoning
c. scarlet fever
d. tuberculosis
c. scarlet fever
You have isolated a gram-positive bacterium with low G + C content from
unpasteurized milk. It infected a pregnant woman, and now you are worried
that her child will be stillborn. What bacterium is it?
a. Listeria monocytogenes
b. Clostridium
c. Anabaena
d. Mycobacterium
Listeria monocytogenes
- associated with dairy products
- can cause stilbirth
Which one of the following does NOT belong with the others?
a. Bartonella
b. Staphylococcus
c. Rickettsia
d. Wolbachia
e. Ehrilchia
b. Staphylococcus
Gram-positive organisms with high G+C content are in the phylum
__________.
a. Proteobacteria
b. Spirochaetes
c. Actinobacteria
d. Firmicutes
c. Actinobacteria
Which of the following factors is believed to limit the size of most bacterial
cells?
a. the availability of nitrogen in the environment
b. the fact that nutrients must enter the cells by simple diffusion
c. the ability to acquire oxygen for cell respiration
d. the availability of carbon in the environment
b. the fact that nutrients must enter the cells by simple diffusion
Which of the following photosynthetic bacteria carries out oxygenic
photosynthesis and most likely altered Earth's atmosphere by significantly
contributing to the accumulation of oxygen gas?
a. Cyanobacteria, such as Anabaena and Prochlorococcus
b. Green nonsulfur bacteria such as Chloroflexus.
c. Green sulfur bacteria such as Chlorobium
d. Purple sulfur bacteria
a. Cyanobacteria, such as Anabaena and Prochlorococcus
Which of the following genera can be described as a non-motile aerobic gram
negative rod?
a. Staphylococcus
b. Treponema
c. Neisseria
