MICROBIOLOGY EXAM 2 2025| COMPLETE EXAM SET
(QUESTIONS AND VERIFIED ANSWERS)FREQUENTLY MOST
TESTED QUESTIONS | ALREADY PASSED!!
Question 1
Which of the following is NOT listed as one of the five major bacteria phyla?
A) Gram positives
B) Spirochetes
C) Chlamydias
D) Cyanobacteria
E) Archaea
Correct Answer: E) Archaea
Rationale: The five major bacteria phyla listed are "Gram positives,
Gram negatives, Spirochetes, Chlamydias, Cyanobacteria." Archaea
is not on this list, though it is another domain of life.
Question 2
Which characteristic is typical of Firmicutes?
A) Acid fast cell walls.
B) Filamentous growth.
C) Lipopolysaccharides and outer membrane.
D) Spiral structure for mobility.
E) Ability to form endospores.
Correct Answer: E) Ability to form endospores.
Rationale: Firmicutes have the "ability to form endospores" and are
"Gram Positive."
,Question 3
What feature of Firmicutes provides protection from phagocytosis but also
serves as a point of attack for antibiotics?
A) Endospores
B) Flagella
C) Capsules
D) Thick cell wall
E) Lipopolysaccharides
Correct Answer: D) Thick cell wall
Rationale: Firmicutes possess a "thick cell wall [that] offers
protection from phagocytosis, but also a point of attack for
antibiotics."
Question 4
Which characteristic is unique to Actinobacteria among the major bacteria
phyla?
A) Ability to form endospores.
B) Lipopolysaccharides in the outer membrane.
C) Spiral structure for mobility.
D) Photosynthetic capabilities.
E) Acid fast (mycolic acid surrounds cells).
Correct Answer: E) Acid fast (mycolic acid surrounds cells).
Rationale: Actinobacteria are described as "Acid fast (mycolic acid
surrounds cells)."
, Question 5
Actinobacteria often exhibit what type of growth that aids in their spread?
A) Tumbling motility
B) Binary fission
C) Unicellular colonies
D) Filamentous growth
E) Swarming motility
Correct Answer: D) Filamentous growth
Rationale: Actinobacteria display "filamentous growth to aid spread."
Question 6
Which major bacteria phyla is characterized by being mostly virulent and
possessing lipopolysaccharides and an outer membrane that protects from
many antibiotics?
A) Firmicutes
B) Actinobacteria
C) Spirochetes
D) Chlamydias
E) Proteobacteria
Correct Answer: E) Proteobacteria
Rationale: Proteobacteria are "most virulent group" and have
"lipopolysaccharides and outer membrane protect from many
antibiotics."
(QUESTIONS AND VERIFIED ANSWERS)FREQUENTLY MOST
TESTED QUESTIONS | ALREADY PASSED!!
Question 1
Which of the following is NOT listed as one of the five major bacteria phyla?
A) Gram positives
B) Spirochetes
C) Chlamydias
D) Cyanobacteria
E) Archaea
Correct Answer: E) Archaea
Rationale: The five major bacteria phyla listed are "Gram positives,
Gram negatives, Spirochetes, Chlamydias, Cyanobacteria." Archaea
is not on this list, though it is another domain of life.
Question 2
Which characteristic is typical of Firmicutes?
A) Acid fast cell walls.
B) Filamentous growth.
C) Lipopolysaccharides and outer membrane.
D) Spiral structure for mobility.
E) Ability to form endospores.
Correct Answer: E) Ability to form endospores.
Rationale: Firmicutes have the "ability to form endospores" and are
"Gram Positive."
,Question 3
What feature of Firmicutes provides protection from phagocytosis but also
serves as a point of attack for antibiotics?
A) Endospores
B) Flagella
C) Capsules
D) Thick cell wall
E) Lipopolysaccharides
Correct Answer: D) Thick cell wall
Rationale: Firmicutes possess a "thick cell wall [that] offers
protection from phagocytosis, but also a point of attack for
antibiotics."
Question 4
Which characteristic is unique to Actinobacteria among the major bacteria
phyla?
A) Ability to form endospores.
B) Lipopolysaccharides in the outer membrane.
C) Spiral structure for mobility.
D) Photosynthetic capabilities.
E) Acid fast (mycolic acid surrounds cells).
Correct Answer: E) Acid fast (mycolic acid surrounds cells).
Rationale: Actinobacteria are described as "Acid fast (mycolic acid
surrounds cells)."
, Question 5
Actinobacteria often exhibit what type of growth that aids in their spread?
A) Tumbling motility
B) Binary fission
C) Unicellular colonies
D) Filamentous growth
E) Swarming motility
Correct Answer: D) Filamentous growth
Rationale: Actinobacteria display "filamentous growth to aid spread."
Question 6
Which major bacteria phyla is characterized by being mostly virulent and
possessing lipopolysaccharides and an outer membrane that protects from
many antibiotics?
A) Firmicutes
B) Actinobacteria
C) Spirochetes
D) Chlamydias
E) Proteobacteria
Correct Answer: E) Proteobacteria
Rationale: Proteobacteria are "most virulent group" and have
"lipopolysaccharides and outer membrane protect from many
antibiotics."
