Chapter 5 BIOL 2051 Exam
Prep Testbank – 2025 Edition
Including Exam Questions
and Certified Answers, with a
100% Guarantee of
Success
, BIOL 2051 - Ch. 5 Testbank (EXAM 1),
Chapter 13 (micobio), Microbiology
Test 3: Chapter 13 practice questions,
Micro - Chapter 13 - WileyPLUS
Questions, Microbiology Test 3
(chapters 13,15-17) In-class assignments,
Biology 2EE3 Chapter 4, MCB Exam 3
Question 1
Plaque assays for determining viral titer measures
a. only infectious viral particles
b. all viruses, approximately 10% of
c. all virus particles present
d. the number of infected host cells Correct Answer
only infectious viral particles
Question 2
Which of the following is a method for determining viral titer? a.
Hemagluttination
b. Quantitative precipitation
c. Viral immobilization
d. All of the above Correct Answer
Hemagluttination
Question 3
Which of the following is not a subcellular, infectious agent? a.
viroid
b. mycoplasma
,c. satellite virus
d. prion
Correct Answer
Mycoplasma
Question 4
A prion is
a. a subcellular infectious agent with a naked RNA genome
b. a subcellular infectious agent with a protein coated RNA genome
c. an abnormally shaped protein
d. an abnormally shaped RNA molecule Correct Answer an abnormally shaped protein
Question 5
(T/F) Viruses are obligate intracellular parasites
Correct Answer
True
Question 6
(T/F) Lytic viruses replicate within the bacteria and lyse the host cell while lysogenic viruses
can remain in a non-lytic state for an extended period of time
Correct Answer
True
Question 7
(T/F) A prophage is an immature virus particle just prior to assembly
Correct Answer
False
Question 8
(T/F) The most inclusive taxonomic group for viruses established by the International
Committee on the Taxonomy of Viruses is the kingdom.
Correct Answer
False
Question 9
(T/F) Viroids only infect plants.
Correct Answer
True
Question 10
, (T/F) Kuru and mad cow disease are caused by viroids.
Correct Answer
False
Question 11
Select the hypothesis that best describes the evolutionary origins of viruses.
a. The coevolution theory suggests viruses emerged around the same time as the cellular life
and that the viruses we see today are a product of their continual evolution alongside their
hosts.
b.The regressive hypothesis suggests viruses evolved from life forms that lost some of its
essential features and has become dependent on a host.
c. The progressive hypothesis suggests viruses evolved from genetic elements that evolved
functions enabling them to replicate and be transmitted in a semi-autonomous fashion. d.
All of these statements are correct.
Correct Answer
All of these statements are correct.
Question 12
Which of the following does NOT describe the cultivation of bacteriophages in the lab?
a. They are cultivated by adding a small quantity of phage to a culture of growing bacterial
cells.
b. In the case of lytic bacteriophages, the bacteria in the culture will eventually be destroyed
and the remaining liquid will contain trillions of copies of the bacteriophage.
c. In the case of lysogenic bacteriophages, some of the phage that will not kill their bacterial
host cell but instead will enter a non-replicating (or latent) state.
d. To cultivate a phage that originated from a single viral particle, a small number of phage is
added to a small amount of bacterial culture. The mix is added to molten agar and poured
over a nutrient plate.
e. They cannot be grown in the lab.
Correct Answer
They cannot be grown in the lab.
Question 13
Animal viruses are cultivated and harvested by:
a. adding a large amount of the virus to animal cells begin grown to culture. Since each
virion can produce several new virions, over time the number of virions in the culture
media increases by infecting neighboring cells.
b. adding a small amount of the virus to animal cells begin grown to culture. Since each
virion can produce several new virions, over time the number of virions in the culture
media increases by infecting neighboring cells.
c. adding a large amount of the virus to plant cells begin grown to culture. Since each virion
can produce several new virions, over time the number of virions in the culture media
increases by infecting neighboring cells.
Prep Testbank – 2025 Edition
Including Exam Questions
and Certified Answers, with a
100% Guarantee of
Success
, BIOL 2051 - Ch. 5 Testbank (EXAM 1),
Chapter 13 (micobio), Microbiology
Test 3: Chapter 13 practice questions,
Micro - Chapter 13 - WileyPLUS
Questions, Microbiology Test 3
(chapters 13,15-17) In-class assignments,
Biology 2EE3 Chapter 4, MCB Exam 3
Question 1
Plaque assays for determining viral titer measures
a. only infectious viral particles
b. all viruses, approximately 10% of
c. all virus particles present
d. the number of infected host cells Correct Answer
only infectious viral particles
Question 2
Which of the following is a method for determining viral titer? a.
Hemagluttination
b. Quantitative precipitation
c. Viral immobilization
d. All of the above Correct Answer
Hemagluttination
Question 3
Which of the following is not a subcellular, infectious agent? a.
viroid
b. mycoplasma
,c. satellite virus
d. prion
Correct Answer
Mycoplasma
Question 4
A prion is
a. a subcellular infectious agent with a naked RNA genome
b. a subcellular infectious agent with a protein coated RNA genome
c. an abnormally shaped protein
d. an abnormally shaped RNA molecule Correct Answer an abnormally shaped protein
Question 5
(T/F) Viruses are obligate intracellular parasites
Correct Answer
True
Question 6
(T/F) Lytic viruses replicate within the bacteria and lyse the host cell while lysogenic viruses
can remain in a non-lytic state for an extended period of time
Correct Answer
True
Question 7
(T/F) A prophage is an immature virus particle just prior to assembly
Correct Answer
False
Question 8
(T/F) The most inclusive taxonomic group for viruses established by the International
Committee on the Taxonomy of Viruses is the kingdom.
Correct Answer
False
Question 9
(T/F) Viroids only infect plants.
Correct Answer
True
Question 10
, (T/F) Kuru and mad cow disease are caused by viroids.
Correct Answer
False
Question 11
Select the hypothesis that best describes the evolutionary origins of viruses.
a. The coevolution theory suggests viruses emerged around the same time as the cellular life
and that the viruses we see today are a product of their continual evolution alongside their
hosts.
b.The regressive hypothesis suggests viruses evolved from life forms that lost some of its
essential features and has become dependent on a host.
c. The progressive hypothesis suggests viruses evolved from genetic elements that evolved
functions enabling them to replicate and be transmitted in a semi-autonomous fashion. d.
All of these statements are correct.
Correct Answer
All of these statements are correct.
Question 12
Which of the following does NOT describe the cultivation of bacteriophages in the lab?
a. They are cultivated by adding a small quantity of phage to a culture of growing bacterial
cells.
b. In the case of lytic bacteriophages, the bacteria in the culture will eventually be destroyed
and the remaining liquid will contain trillions of copies of the bacteriophage.
c. In the case of lysogenic bacteriophages, some of the phage that will not kill their bacterial
host cell but instead will enter a non-replicating (or latent) state.
d. To cultivate a phage that originated from a single viral particle, a small number of phage is
added to a small amount of bacterial culture. The mix is added to molten agar and poured
over a nutrient plate.
e. They cannot be grown in the lab.
Correct Answer
They cannot be grown in the lab.
Question 13
Animal viruses are cultivated and harvested by:
a. adding a large amount of the virus to animal cells begin grown to culture. Since each
virion can produce several new virions, over time the number of virions in the culture
media increases by infecting neighboring cells.
b. adding a small amount of the virus to animal cells begin grown to culture. Since each
virion can produce several new virions, over time the number of virions in the culture
media increases by infecting neighboring cells.
c. adding a large amount of the virus to plant cells begin grown to culture. Since each virion
can produce several new virions, over time the number of virions in the culture media
increases by infecting neighboring cells.
