BIOL 240 - UW - FINAL EXAM 200 ACTUAL
QUESTIONS AND CORRECT ANSWERS LATEST 2026
ALREADY GRADED A+ ASSURED PASS
This comprehensive 200-question exam set covers the core curriculum of a
university-level microbiology course, likely BIOL 240 at the University of
Washington. The questions are organized into major thematic sections
including eukaryotic microorganisms (fungi, algae, protozoa, and slime
molds), bacterial cell structure and staining techniques, viral biology and
classification, microbial metabolism and growth conditions, bacterial genetics
and molecular biology, antimicrobial drugs and their mechanisms, host-
pathogen interactions and immunology, and clinically significant infectious
diseases caused by bacteria, viruses, fungi, and parasites. Each question is
presented as a multiple-choice item with a single correct answer and a
detailed rationale explaining the underlying biological principle, making this
an effective study resource for exam preparation.
1. What structural feature do cellulose and chitin share that provides strength and
rigidity?
A) α-1,4-glycosidic bonds
B) β-1,4-glycosidic bonds
C) Peptide bonds
D) Ester linkages
Answer: B
Rationale: Cellulose found in algae and plants and chitin found in fungi both use
β-1,4-glycosidic bonds between sugar monomers. These specific bonds contribute
to their rigid and strong structural properties .
2. Most proteins in the eukaryotic cytoplasmic membrane have relocated to which
location?
A) The nucleus
B) The mitochondrial membrane
C) The endoplasmic reticulum
D) The Golgi apparatus
Answer: B
, Rationale: While many proteins are still in the eukaryotic plasma membrane, a
large proportion have been redistributed to internal organelle membranes,
particularly the mitochondrial membrane .
3. What polymer primarily composes the fungal cell wall?
A) Cellulose
B) Peptidoglycan
C) N-acetylglucosamine (NAG)
D) Pseudopeptidoglycan
Answer: C
Rationale: The fungal cell wall is built mainly from chitin, which is a polymer of
N-acetylglucosamine (NAG) subunits .
4. What are the primary functions of the eukaryotic cytoskeleton?
A) Energy production and genetic storage
B) Protein synthesis and lipid metabolism
C) Intracellular trafficking, motion, and cell division
D) DNA replication and transcription
Answer: C
Rationale: The cytoskeleton is a network of fibers involved in moving materials
within the cell, enabling cell movement, and orchestrating cell division. Its
structure can be visualized using fluorescent microscopy .
5. Which protein is the correct match for the eukaryotic protein Tubulin?
A) MreB
B) FtsZ
C) ParM
D) Actin
Answer: B
Rationale: FtsZ is the prokaryotic homolog of eukaryotic tubulin. It forms a ring
structure (Z-ring) at the site of cell division in bacteria .
6. Which protein is the correct match for the eukaryotic protein Actin?
A) FtsZ
B) ParM
C) MreB
D) Tubulin
Answer: C
, Rationale: MreB is a bacterial protein that forms helical filaments beneath the
cytoplasmic membrane and is considered the prokaryotic homolog of actin, playing
a role in determining cell shape .
7. Which protein is the correct match for the segregation of bacterial Plasmids?
A) FtsZ
B) MreB
C) ParM
D) Tubulin
Answer: C
Rationale: ParM is an actin-like protein that forms filaments to help segregate
plasmids during bacterial cell division, ensuring each daughter cell receives a copy
.
8. What is the characteristic 9 + 2 arrangement of an axoneme?
A) Nine single microtubules surrounding two central single microtubules
B) Nine pairs of microtubules surrounding two central single microtubules
C) Nine pairs of microtubules with no central microtubules
D) A random arrangement of microtubules
Answer: B
Rationale: The axoneme, which is the core of cilia and flagella, has a "9 + 2"
array: nine pairs of microtubules arranged in a ring around two central single
microtubules .
9. Organisms in which groups are most likely to have pseudopods and often lack
cell walls?
A) Fungi and Algae
B) Protozoa and Slime Molds
C) Bacteria and Archaea
D) Viruses and Prions
Answer: B
Rationale: Protozoa and slime molds are known for their amoeboid movement
using pseudopods. Many of these organisms do not have rigid cell walls, allowing
for this type of motility .
10. Which groups of eukaryotes are typically non-motile?
A) Protozoa and Algae
B) Slime Molds and Protozoa
C) Fungi and Algae
D) Fungi and Protozoa
, Answer: C
Rationale: While many fungi and algae can be motile at some life stages, both
groups are known for having many non-motile members. In contrast, protozoa and
many slime molds are typically motile .
11. What type of metabolism do Fungi, Protozoa, and Slime Molds all use?
A) Phototrophic
B) Chemolithotrophic
C) Heterotrophic
D) Mixotrophic
Answer: C
Rationale: Fungi, protozoa, and slime molds are all heterotrophs. They obtain
their carbon and energy by consuming organic compounds from other organisms .
12. What type of metabolism do algae predominantly use?
A) Heterotrophic
B) Phototrophic
C) Chemoorganotrophic
D) Saprotrophic
Answer: B
Rationale: Algae are phototrophic organisms. They use light energy to perform
photosynthesis and fix inorganic carbon dioxide into organic compounds, similar
to plants .
13. What is the primary function of a pseudopod?
A) Genetic material exchange
B) Sensing environmental chemicals
C) Cell motility and phagocytosis
D) Structural support
Answer: C
Rationale: Pseudopods are temporary "false feet" formed by the extension of the
cell membrane and cytoplasm. They are driven by actin polymerization and ATP
hydrolysis and are used for movement and engulfing food particles .
14. Which organism is the model organism for the study of fungi?
A) Chlamydomonas
B) Escherichia coli
C) Saccharomyces cerevisiae
D) Dictyostelium discoideum
Answer: C
QUESTIONS AND CORRECT ANSWERS LATEST 2026
ALREADY GRADED A+ ASSURED PASS
This comprehensive 200-question exam set covers the core curriculum of a
university-level microbiology course, likely BIOL 240 at the University of
Washington. The questions are organized into major thematic sections
including eukaryotic microorganisms (fungi, algae, protozoa, and slime
molds), bacterial cell structure and staining techniques, viral biology and
classification, microbial metabolism and growth conditions, bacterial genetics
and molecular biology, antimicrobial drugs and their mechanisms, host-
pathogen interactions and immunology, and clinically significant infectious
diseases caused by bacteria, viruses, fungi, and parasites. Each question is
presented as a multiple-choice item with a single correct answer and a
detailed rationale explaining the underlying biological principle, making this
an effective study resource for exam preparation.
1. What structural feature do cellulose and chitin share that provides strength and
rigidity?
A) α-1,4-glycosidic bonds
B) β-1,4-glycosidic bonds
C) Peptide bonds
D) Ester linkages
Answer: B
Rationale: Cellulose found in algae and plants and chitin found in fungi both use
β-1,4-glycosidic bonds between sugar monomers. These specific bonds contribute
to their rigid and strong structural properties .
2. Most proteins in the eukaryotic cytoplasmic membrane have relocated to which
location?
A) The nucleus
B) The mitochondrial membrane
C) The endoplasmic reticulum
D) The Golgi apparatus
Answer: B
, Rationale: While many proteins are still in the eukaryotic plasma membrane, a
large proportion have been redistributed to internal organelle membranes,
particularly the mitochondrial membrane .
3. What polymer primarily composes the fungal cell wall?
A) Cellulose
B) Peptidoglycan
C) N-acetylglucosamine (NAG)
D) Pseudopeptidoglycan
Answer: C
Rationale: The fungal cell wall is built mainly from chitin, which is a polymer of
N-acetylglucosamine (NAG) subunits .
4. What are the primary functions of the eukaryotic cytoskeleton?
A) Energy production and genetic storage
B) Protein synthesis and lipid metabolism
C) Intracellular trafficking, motion, and cell division
D) DNA replication and transcription
Answer: C
Rationale: The cytoskeleton is a network of fibers involved in moving materials
within the cell, enabling cell movement, and orchestrating cell division. Its
structure can be visualized using fluorescent microscopy .
5. Which protein is the correct match for the eukaryotic protein Tubulin?
A) MreB
B) FtsZ
C) ParM
D) Actin
Answer: B
Rationale: FtsZ is the prokaryotic homolog of eukaryotic tubulin. It forms a ring
structure (Z-ring) at the site of cell division in bacteria .
6. Which protein is the correct match for the eukaryotic protein Actin?
A) FtsZ
B) ParM
C) MreB
D) Tubulin
Answer: C
, Rationale: MreB is a bacterial protein that forms helical filaments beneath the
cytoplasmic membrane and is considered the prokaryotic homolog of actin, playing
a role in determining cell shape .
7. Which protein is the correct match for the segregation of bacterial Plasmids?
A) FtsZ
B) MreB
C) ParM
D) Tubulin
Answer: C
Rationale: ParM is an actin-like protein that forms filaments to help segregate
plasmids during bacterial cell division, ensuring each daughter cell receives a copy
.
8. What is the characteristic 9 + 2 arrangement of an axoneme?
A) Nine single microtubules surrounding two central single microtubules
B) Nine pairs of microtubules surrounding two central single microtubules
C) Nine pairs of microtubules with no central microtubules
D) A random arrangement of microtubules
Answer: B
Rationale: The axoneme, which is the core of cilia and flagella, has a "9 + 2"
array: nine pairs of microtubules arranged in a ring around two central single
microtubules .
9. Organisms in which groups are most likely to have pseudopods and often lack
cell walls?
A) Fungi and Algae
B) Protozoa and Slime Molds
C) Bacteria and Archaea
D) Viruses and Prions
Answer: B
Rationale: Protozoa and slime molds are known for their amoeboid movement
using pseudopods. Many of these organisms do not have rigid cell walls, allowing
for this type of motility .
10. Which groups of eukaryotes are typically non-motile?
A) Protozoa and Algae
B) Slime Molds and Protozoa
C) Fungi and Algae
D) Fungi and Protozoa
, Answer: C
Rationale: While many fungi and algae can be motile at some life stages, both
groups are known for having many non-motile members. In contrast, protozoa and
many slime molds are typically motile .
11. What type of metabolism do Fungi, Protozoa, and Slime Molds all use?
A) Phototrophic
B) Chemolithotrophic
C) Heterotrophic
D) Mixotrophic
Answer: C
Rationale: Fungi, protozoa, and slime molds are all heterotrophs. They obtain
their carbon and energy by consuming organic compounds from other organisms .
12. What type of metabolism do algae predominantly use?
A) Heterotrophic
B) Phototrophic
C) Chemoorganotrophic
D) Saprotrophic
Answer: B
Rationale: Algae are phototrophic organisms. They use light energy to perform
photosynthesis and fix inorganic carbon dioxide into organic compounds, similar
to plants .
13. What is the primary function of a pseudopod?
A) Genetic material exchange
B) Sensing environmental chemicals
C) Cell motility and phagocytosis
D) Structural support
Answer: C
Rationale: Pseudopods are temporary "false feet" formed by the extension of the
cell membrane and cytoplasm. They are driven by actin polymerization and ATP
hydrolysis and are used for movement and engulfing food particles .
14. Which organism is the model organism for the study of fungi?
A) Chlamydomonas
B) Escherichia coli
C) Saccharomyces cerevisiae
D) Dictyostelium discoideum
Answer: C
