MICROBIOLOGY FINAL EXAM NEWEST 2025/2026 ACTUAL EXAM
MICROBIOLOGY FINAL EXAM NEWEST 2025/2026 ACTUAL
EXAM COMPLETE 400 QUESTIONS AND CORRECT DETAILED
ANSWERS (VERIFIED ANSWERS) |ALREADY GRADED
A+||BRAND NEW VERSION!!
Although it had been thought that dental plaque consisted primarily of
streptococci, more recent research showed that a variety of microbes are present.
According to the chapter, what approaches were used to identify these additional
microbes and to determine their 3D structure in the biofilm?
a. analysis of oxygen consumption
b. streak plates/spread plates/ pour plates
c. phylogenetic probes/ flurorescent in situ hybridization
d. metagenomic analysis alone - ANSWER-c. phylogenetic probes/fluorescent in
situ hybridization
how are immune cells able to detect foreign pathogens?
a. they are able to detect structures on the foreign cells that are not found in the
host
b. they can compare the DNA sequences from the foreign cells to host DNA
c. they detect foreign, unfamiliar chemical substances released by the invading
cells - ANSWER-a. they are able to detect structures on the surfaces of foreign
cells that are not found in the host
how does a capsule help certain bacteria evade detection by the immune system?
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, MICROBIOLOGY FINAL EXAM NEWEST 2025/2026 ACTUAL EXAM
a. capsules allow the bacteria to stick together, creating a larger mass that is too
big for immune cells to engulf
b. capsules have the ability to destroy antibodies secreted by the immune system
c. the capsule makes the bacterium too sticky to be phagocytosed by the immune
cells
d. the capsule is composed of polysaccharides that are similar to those found int
he host; thus, the immune system does not recognize it as foreign - ANSWER-d.
the capsule is composed of polysaccharides that are simlar to those found int he
host; thus, the immune system does not recognize it as foreign
which of the following microorganisms actually grows inside the macrophage?
a. tuberulosis bacterium
b. shigella
c. leishmania
d. legionella
e. streptococcus pneumoniae - ANSWER-a. tuberculosis bacterium
how does the protozoan Trypanosoma evade detection by the immune system?
a. it can change the surface antigens frequently, preventing the immune system
from tracking it
b. it produces a capsule which is composed of polysaccharides similar to those
found in the host
c. it can resist oxidation inside macrophages
d. it prevents phagosome-lysosome fusion - ANSWER-a. it can change the surface
antigens frequently, preventing the immune system from tracking it
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, MICROBIOLOGY FINAL EXAM NEWEST 2025/2026 ACTUAL EXAM
endotoxins are also known as
a. cytokines
b. interleukin-1
c. lipid A
d. prostaglandins - ANSWER-c. lipid a
when would endotoxins be released from a bacterial cell?
a. during bacterial conjugation
b. when the cell attaches to host cell in the human body
c. when the cell moves toward a energy source
d. when the cell dies - ANSWER-d. when the cell dies
which of the following would be the first sign of an infection that resulted in the
release of endotoxin?
a. pain
b. weakness
c. nausea
d. fever - ANSWER-d. fever
Helicobacter pylori is a bacterium found in the stomachs of roughly half of the
human population. It is considered to be a pathogen because:
a. when present, it accounts for the vast majority of stomach microbial biomass
b. it is the only bacterium found in the human stomach
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, MICROBIOLOGY FINAL EXAM NEWEST 2025/2026 ACTUAL EXAM
c. it can cause chronic inflammation
d. it is found in the stomach mucosa rather than the lumen - ANSWER-c. it can
cause chronic inflammation
The colon has been described as a living fermentation vessel. Which type of
culture system would it most resemble?
a. immobilized cell culture
b. bath culture
c. continuous culture
d. none of the listed responses is correct - ANSWER-c. continuous culture
obligate anaerobes are likely to be found in the ______
a. nasal cavity
b. colon
c. mouth
d. urogenital tract - ANSWER-b. colon
one advantage of a monogastric digestive system is that _______
a. nutrients are easily accessible to the microbes that aid in digestion and vitamin
production
b. digestion occurs in compartments
c. digestion occurs more slowly
d. more microbes are present - ANSWER-a. nutrients are easily accessible to the
microbes that aid in digestion and vitamin production
4|Page
MICROBIOLOGY FINAL EXAM NEWEST 2025/2026 ACTUAL
EXAM COMPLETE 400 QUESTIONS AND CORRECT DETAILED
ANSWERS (VERIFIED ANSWERS) |ALREADY GRADED
A+||BRAND NEW VERSION!!
Although it had been thought that dental plaque consisted primarily of
streptococci, more recent research showed that a variety of microbes are present.
According to the chapter, what approaches were used to identify these additional
microbes and to determine their 3D structure in the biofilm?
a. analysis of oxygen consumption
b. streak plates/spread plates/ pour plates
c. phylogenetic probes/ flurorescent in situ hybridization
d. metagenomic analysis alone - ANSWER-c. phylogenetic probes/fluorescent in
situ hybridization
how are immune cells able to detect foreign pathogens?
a. they are able to detect structures on the foreign cells that are not found in the
host
b. they can compare the DNA sequences from the foreign cells to host DNA
c. they detect foreign, unfamiliar chemical substances released by the invading
cells - ANSWER-a. they are able to detect structures on the surfaces of foreign
cells that are not found in the host
how does a capsule help certain bacteria evade detection by the immune system?
1|Page
, MICROBIOLOGY FINAL EXAM NEWEST 2025/2026 ACTUAL EXAM
a. capsules allow the bacteria to stick together, creating a larger mass that is too
big for immune cells to engulf
b. capsules have the ability to destroy antibodies secreted by the immune system
c. the capsule makes the bacterium too sticky to be phagocytosed by the immune
cells
d. the capsule is composed of polysaccharides that are similar to those found int
he host; thus, the immune system does not recognize it as foreign - ANSWER-d.
the capsule is composed of polysaccharides that are simlar to those found int he
host; thus, the immune system does not recognize it as foreign
which of the following microorganisms actually grows inside the macrophage?
a. tuberulosis bacterium
b. shigella
c. leishmania
d. legionella
e. streptococcus pneumoniae - ANSWER-a. tuberculosis bacterium
how does the protozoan Trypanosoma evade detection by the immune system?
a. it can change the surface antigens frequently, preventing the immune system
from tracking it
b. it produces a capsule which is composed of polysaccharides similar to those
found in the host
c. it can resist oxidation inside macrophages
d. it prevents phagosome-lysosome fusion - ANSWER-a. it can change the surface
antigens frequently, preventing the immune system from tracking it
2|Page
, MICROBIOLOGY FINAL EXAM NEWEST 2025/2026 ACTUAL EXAM
endotoxins are also known as
a. cytokines
b. interleukin-1
c. lipid A
d. prostaglandins - ANSWER-c. lipid a
when would endotoxins be released from a bacterial cell?
a. during bacterial conjugation
b. when the cell attaches to host cell in the human body
c. when the cell moves toward a energy source
d. when the cell dies - ANSWER-d. when the cell dies
which of the following would be the first sign of an infection that resulted in the
release of endotoxin?
a. pain
b. weakness
c. nausea
d. fever - ANSWER-d. fever
Helicobacter pylori is a bacterium found in the stomachs of roughly half of the
human population. It is considered to be a pathogen because:
a. when present, it accounts for the vast majority of stomach microbial biomass
b. it is the only bacterium found in the human stomach
3|Page
, MICROBIOLOGY FINAL EXAM NEWEST 2025/2026 ACTUAL EXAM
c. it can cause chronic inflammation
d. it is found in the stomach mucosa rather than the lumen - ANSWER-c. it can
cause chronic inflammation
The colon has been described as a living fermentation vessel. Which type of
culture system would it most resemble?
a. immobilized cell culture
b. bath culture
c. continuous culture
d. none of the listed responses is correct - ANSWER-c. continuous culture
obligate anaerobes are likely to be found in the ______
a. nasal cavity
b. colon
c. mouth
d. urogenital tract - ANSWER-b. colon
one advantage of a monogastric digestive system is that _______
a. nutrients are easily accessible to the microbes that aid in digestion and vitamin
production
b. digestion occurs in compartments
c. digestion occurs more slowly
d. more microbes are present - ANSWER-a. nutrients are easily accessible to the
microbes that aid in digestion and vitamin production
4|Page
