Question 1

Infectious naked strands of RNA that affect plants are called ______.

Accepted Answer

A)   viroids
B)   phages
C)   prions
D)   oncogenic viruses
E)   spikesF) A) and B)
G) D) and E)

Question 2

Prophages can be activated into viral replication and enter the lytic cycle.

Accepted Answer

A) True 
 B)False

Question 3

Viruses are the most common cause of acute infections that do not result in hospitalization.

Accepted Answer

A) True 
 B)False

Question 4

Viral tissue specificities are called ______.

Accepted Answer

A)   ranges
B)   virions
C)   receptacles
D)   tropisms
E)   uncoatingF) A) and C)
G) B) and C)

Question 5

Freshly isolated animal tissue that is placed in a growth medium and allowed to produce a cell monolayer is referred to as a/n _____ cell culture.

Accepted Answer

A)   initial
B)   primary
C)   secondary
D)   continuous
E)   positiveF) B) and D)
G) All of the above

Question 6

Spikes are glycoproteins that can be found projecting from the viral capsid.

Accepted Answer

A) True 
 B)False

Question 7

Successful anti-HIV drug therapies today work by blocking the action of viral reverse transcriptase.Select which step of virus multiplication that would be directly blocked by this mechanism.

Accepted Answer

A)   Adsorption
B)   Penetration
C)   Synthesis
D)   Assembly
E)   ReleaseF) A) and C)
G) A) and D)

Question 8

A treatment for bacterial infections from the early 20th century has made a comeback; the use of bacterial viruses to eliminate bacterial infections.Which explanation most accurately describes the reason for the return of this treatment?

Accepted Answer

A)   A wide variety of bacteria cause a large percentage of human infections, producing much sickness and death.
B)   Viruses can infect bacteria, transferring pathogenic genes; the viral genes can then be suppressed, causing the bacteria to not replicate viruses.
C)   The attachment structures on the virus and the receptors on the host cells make for exquisite specificity of viruses for particular bacterial species.
D)   Antibiotic resistance in bacteria is on the increase, so using a different kind of therapy offers an alternative to traditional drugs.E) A) and D)
F) None of the above

Question 9

During lysogeny,an inactive prophage state occurs when the viral DNA is inserted into the host ______.

Accepted Answer

A)   cytoplasm
B)   nucleus
C)   nucleolus
D)   DNA
E)   cell membraneF) C) and D)
G) A) and E)

Question 10

A negative RNA virus must first

Accepted Answer

A)   synthesize a DNA copy of its genome.
B)   synthesize a negative RNA copy of its genome.
C)   synthesize a positive RNA copy of its genome.
D)   transcribe reverse transcriptase.
E)   transcribe RNA polymerase.F) C) and E)
G) A) and E)

Question 11

The activation of a prophage is called ______.

Accepted Answer

A)   activation
B)   lysogeny
C)   transformation
D)   induction
E)   adsorptionF) None of the above
G) B) and E)

Question 12

Lysogeny refers to

Accepted Answer

A)   altering the host range of a virus.
B)   the latent state of herpes infections.
C)   virions exiting host cell.
D)   the viral genome inserting into bacterial host chromosome.E) All of the above
F) None of the above

Question 13

Viruses acquire envelopes around their nucleocapsids during ______.

Accepted Answer

A)   replication
B)   assembly
C)   adsorption
D)   release
E)   penetrationF) B) and D)
G) A) and C)

Question 14

How are viroids transmitted?

Accepted Answer

A)   Respiratory secretions
B)   Sex
C)   Plant seeds
D)   Blood productsE) A) and D)
F) C) and D)

Question 15

Viral capsids are made from subunits called ______.

Accepted Answer

A)   envelopes
B)   spikes
C)   capsomeres
D)   prophages
E)   peptonesF) C) and D)
G) All of the above

Question 16

The event that occurs in bacteriophage multiplication that does not occur in animal virus replication is

Accepted Answer

A)   adsorption to the host cells.
B)   injection of only the viral nucleic acid into the host cell.
C)   host cell synthesis of viral enzymes and capsid proteins.
D)   assembly of nucleocapsids.
E)   replication of viral nucleic acid.F) A) and E)
G) A) and D)

Question 17

One of the principal viral capsid shapes is a 20-sided figure with 12 evenly spaced corners referred to as a/an _____ capsid.

Accepted Answer

A)   spiked
B)   complex
C)   icosahedral
D)   helical
E)   buckeyballF) A) and D)
G) A) and C)

Question 18

Host cells of viruses include ______.

Accepted Answer

A)   humans and other animals
B)   plants and fungi
C)   bacteria
D)   protozoa and algae
E)   All of the choices are correct.F) B) and E)
G) A) and B)

Question 19

Persistent viruses that can reactivate periodically are ______.

Accepted Answer

A)   chronic latent viruses
B)   oncoviruses
C)   syncytia
D)   inclusion bodies
E)   cytopathicF) C) and D)
G) A) and C)

Question 20

Viruses that cause infection resulting in alternating periods of activity with symptoms and inactivity without symptoms are called ______.

Accepted Answer

A)   latent
B)   oncogenic
C)   prions
D)   viroids
E)   delta agentsF) A) and E)
G) None of the above

Exam 6: An Introduction to the Viruses

Viral tissue specificities are called ______.

Correct AnswerverifiedShow Answer

Host cells of viruses include ______.

Correct AnswerverifiedShow Answer

One of the principal viral capsid shapes is a 20-sided figure with 12 evenly spaced corners referred to as a/an _____ capsid.

Correct AnswerverifiedShow Answer

During lysogeny,an inactive prophage state occurs when the viral DNA is inserted into the host ______.

Correct AnswerverifiedShow Answer

Spikes are glycoproteins that can be found projecting from the viral capsid.

Correct AnswerverifiedShow Answer

The event that occurs in bacteriophage multiplication that does not occur in animal virus replication is

Correct AnswerverifiedShow Answer

Viral capsids are made from subunits called ______.

Correct AnswerverifiedShow Answer

The activation of a prophage is called ______.

Correct AnswerverifiedShow Answer

Viruses that cause infection resulting in alternating periods of activity with symptoms and inactivity without symptoms are called ______.

Correct AnswerverifiedShow Answer

Successful anti-HIV drug therapies today work by blocking the action of viral reverse transcriptase.Select which step of virus multiplication that would be directly blocked by this mechanism.

Correct AnswerverifiedShow Answer

Viruses are the most common cause of acute infections that do not result in hospitalization.

Correct AnswerverifiedShow Answer

How are viroids transmitted?

Correct AnswerverifiedShow Answer

Lysogeny refers to

Correct AnswerverifiedShow Answer

A treatment for bacterial infections from the early 20th century has made a comeback; the use of bacterial viruses to eliminate bacterial infections.Which explanation most accurately describes the reason for the return of this treatment?

Correct AnswerverifiedShow Answer

Prophages can be activated into viral replication and enter the lytic cycle.

Correct AnswerverifiedShow Answer

Persistent viruses that can reactivate periodically are ______.

Correct AnswerverifiedShow Answer

Infectious naked strands of RNA that affect plants are called ______.

Correct AnswerverifiedShow Answer

A negative RNA virus must first

Correct AnswerverifiedShow Answer

Freshly isolated animal tissue that is placed in a growth medium and allowed to produce a cell monolayer is referred to as a/n _____ cell culture.

Correct AnswerverifiedShow Answer

Viruses acquire envelopes around their nucleocapsids during ______.

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified