Question 1

Viruses are ultramicroscopic because they range in size from 2 mm to 450 mm.

Accepted Answer

A) True 
 B)False

Question 2

The core of every virus particle always contains ________.

Accepted Answer

A)   DNA
B)   capsomeres
C)   enzymes
D)   DNA and RNA
E)   either DNA or RNA

Question 3

The viral genome is carried by ________.

Accepted Answer

A)   DNA only
B)   RNA only
C)   both RNA and DNA
D)   either DNA or RNA but not both

Question 4

Viruses acquire envelopes around their nucleocapsids during ________.

Accepted Answer

A)   replication
B)   assembly
C)   adsorption
D)   release
E)   penetration

Question 5

New, nonenveloped virus release occurs by ________.

Accepted Answer

A)   lysis
B)   budding
C)   exocytosis
D)   both lysis and budding
E)   both budding and exocytosis

Question 6

What is the rationale for providing intravenous fluids and oxygen support for this patient?

Accepted Answer

A)   These measures increase the patient's immune response.
B)   These measures augment antiviral treatment for RSV disease.
C)   These measures prevent secondary respiratory infection while the patient is compromised.
D)   These measures are supportive therapies while the disease runs its course

Question 7

Mammalian viruses capable of starting tumors are ________.

Accepted Answer

A)   chronic latent viruses
B)   oncoviruses
C)   syncytia
D)   inclusion bodies
E)   cytopathic

Question 8

When a virus enters a host cell, the viral genes redirect the genetic and metabolic activities of the host cell.

Accepted Answer

A) True 
 B)False

Question 9

Viruses are unable to multiply outside of a host cell.

Accepted Answer

A) True 
 B)False

Question 10

All of the following pertain to virus envelopes except ________.

Accepted Answer

A)   gained as a virus leaves the host cell membrane
B)   are comprised primarily of lipids
C)   contain special virus proteins
D)   help the virus particle attach to host cells
E)   are located between the capsid and nucleic acid

Question 11

Viral nucleic acids include which of the following?

Accepted Answer

A)   Double-stranded DNA
B)   Single-stranded DNA
C)   Double-stranded RNA
D)   Single-stranded RNA
E)   All of the choices are correct

Question 12

Viruses contain the necessary tools to invade and control a host cell. These tools may consist of a ________.

Accepted Answer

A)   nucleus, nucleic acid strands of DNA and RNA, and enzymes
B)   capsid or envelope, nucleic acid strands of DNA or RNA, and enzymes
C)   nucleus, nucleic acid strands of RNA, capsid, and enzymes
D)   capsid or envelope, nucleic acid strands of DNA, and enzymes

Question 13

Cells grown in culture form a(n)  ________.

Accepted Answer

A)   monolayer
B)   bilayer
C)   aggregate
D)   plaque
E)   None of the choices are correct.

Question 14

Which of the following statements best explains how a bacteriophage can impair human health?

Accepted Answer

A)   Toxins or enzymes are produced by the infected bacterial pathogen that cause pathology in humans.
B)   Invasion by the prophage causes cessation of protein synthesis in human cells.
C)   Lysis of infected human cells results in the release of numerous phage particles.
D)   The entry of the prophage mutates the genome of human cells.

Question 15

You are running an experiment in calf serum, which cannot be autoclaved because proteins essential to your protocol will be denatured. You decide to filter sterilize the serum since the 0.22μm filter is small enough to block any bacteria that may contaminate your tissue culture. The success of this procedure hinges on the fact that ________.

Accepted Answer

A)   the presence of viruses in your serum is inconsequential to your experiment
B)   some of the bacteria will still be allowed to filter through
C)   viruses, as well as bacteria, will also be blocked by the 0.22μm pore size
D)   the proteins in the serum are also blocked by the pore size

Question 16

Helical and icosahedral are terms used to describe the shapes of a virus ________.

Accepted Answer

A)   spike
B)   capsomere
C)   envelope
D)   capsid
E)   core

Question 17

An ideal antiviral drug would be one that killed the host cell, effectively preventing the virus from replicating.

Accepted Answer

A) True 
 B)False

Question 18

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

Accepted Answer

A)   host cytoplasm
B)   host nucleus
C)   host nucleolus
D)   host DNA
E)   host cell membrane

Question 19

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

Question 20

Reverse transcriptase synthesizes ________.

Accepted Answer

A)   the positive RNA strand from a negative RNA strand
B)   a negative RNA strand from a positive RNA strand
C)   RNA from DNA
D)   DNA from RNA
E)   None of the choices are correct

Exam 5: Viral Structure and Multiplication

What is the rationale for providing intravenous fluids and oxygen support for this patient?

Correct Answer
verified

Viruses are unable to multiply outside of a host cell.

Correct Answer
verified

Helical and icosahedral are terms used to describe the shapes of a virus ________.

Correct Answer
verified

Correct Answer
verified

Host cells of viruses include ________.

Correct Answer
verified

Reverse transcriptase synthesizes ________.

Correct Answer
verified

Cells grown in culture form a(n) ________.

Correct Answer
verified

Viral nucleic acids include which of the following?

Correct Answer
verified

Which of the following statements best explains how a bacteriophage can impair human health?

Correct Answer
verified

Viruses contain the necessary tools to invade and control a host cell. These tools may consist of a ________.

Correct Answer
verified

An ideal antiviral drug would be one that killed the host cell, effectively preventing the virus from replicating.

Correct Answer
verified

The viral genome is carried by ________.

Correct Answer
verified

Viruses are ultramicroscopic because they range in size from 2 mm to 450 mm.

Correct Answer
verified

The core of every virus particle always contains ________.

Correct Answer
verified

Mammalian viruses capable of starting tumors are ________.

Correct Answer
verified

All of the following pertain to virus envelopes except ________.

Correct Answer
verified

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

Correct Answer
verified

New, nonenveloped virus release occurs by ________.

Correct Answer
verified

Viruses acquire envelopes around their nucleocapsids during ________.

Correct Answer
verified

When a virus enters a host cell, the viral genes redirect the genetic and metabolic activities of the host cell.

Correct Answer
verified

Exam 5: Viral Structure and Multiplication

What is the rationale for providing intravenous fluids and oxygen support for this patient?

Correct AnswerverifiedShow Answer

Viruses are unable to multiply outside of a host cell.

Correct AnswerverifiedShow Answer

Helical and icosahedral are terms used to describe the shapes of a virus ________.

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Host cells of viruses include ________.

Correct AnswerverifiedShow Answer

Reverse transcriptase synthesizes ________.

Correct AnswerverifiedShow Answer

Cells grown in culture form a(n) ________.

Correct AnswerverifiedShow Answer

Viral nucleic acids include which of the following?

Correct AnswerverifiedShow Answer

Which of the following statements best explains how a bacteriophage can impair human health?

Correct AnswerverifiedShow Answer

Viruses contain the necessary tools to invade and control a host cell. These tools may consist of a ________.

Correct AnswerverifiedShow Answer

An ideal antiviral drug would be one that killed the host cell, effectively preventing the virus from replicating.

Correct AnswerverifiedShow Answer

The viral genome is carried by ________.

Correct AnswerverifiedShow Answer

Viruses are ultramicroscopic because they range in size from 2 mm to 450 mm.

Correct AnswerverifiedShow Answer

The core of every virus particle always contains ________.

Correct AnswerverifiedShow Answer

Mammalian viruses capable of starting tumors are ________.

Correct AnswerverifiedShow Answer

All of the following pertain to virus envelopes except ________.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

New, nonenveloped virus release occurs by ________.

Correct AnswerverifiedShow Answer

Viruses acquire envelopes around their nucleocapsids during ________.

Correct AnswerverifiedShow Answer

When a virus enters a host cell, the viral genes redirect the genetic and metabolic activities of the host cell.

Correct AnswerverifiedShow Answer

Correct Answer
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