Question 1

Viral growth in bird embryos can cause discrete, opaque spots in the embryonic membranes called ______.

Accepted Answer

A)  patches
B)  buds
C)  plaques
D)  cytopathic effects
E)  pocksF) None of the above
G) C) and D)

Question 2

Oncogenic viruses include all the following except ______.

Accepted Answer

A)  hepatitis B virus
B)  measles virus
C)  Papillomavirus
D)  HTLV-I and HTLV-II viruses
E)  Epstein-Barr virusF) A) and B)
G) D) and E)

Question 3

Which of the following occurs during assembly?

Accepted Answer

A)  The nucleocapsid is formed.
B)  New viral nucleic acid is formed.
C)  Viral spikes insert in host cell membrane.
D)  The nucleocapsid is formed and viral spikes insert in host cell membrane.
E)  The viral envelope and the host cell membrane fuse.F) A) and E)
G) C) and E)

Question 4

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 B)
G) D) and E)

Question 5

All of the following pertain to virus envelopes except

Accepted Answer

A)  gained as a virus leaves the host cell membrane.
B)  gained as a virus leaves the nuclear membrane.
C)  contain special virus proteins.
D)  help the virus particle attach to host cells.
E)  located between the capsid and nucleic acid.F) A) and B)
G) A) and E)

Question 6

Tamiflu is a common medication given for influenza treatment.It works by protecting and blocking sialic acid molecules on the surfaces of host cells and influenza virus envelopes as they leave the cell.Which statement reflects the mechanism of Tamiflu's action?

Accepted Answer

A)  Tamiflu blocks protein synthesis of the viral genome.
B)  Tamiflu interferes with the replication of +ssRNA from the -ssRNA genome of the flu virus.
C)  Tamiflu interferes with the release of the budding viruses from the infected host cells.
D)  Tamiflu interferes with the metabolic properties of the virus.E) A) and B)
F) A) and C)

Question 7

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) A) and B)
F) A) and C)

Question 8

Viral tissue specificities are called ______.

Accepted Answer

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

Question 9

Viral spikes

Accepted Answer

A)  are always present on enveloped viruses.
B)  attach the viral capsid and envelope.
C)  allow bacteria to evade host defenses.
D)  are derived from host proteins.
E)  are for recognition among the various types of viruses.F) A) and D)
G) A) and C)

Question 10

You are working in a laboratory that is studying a newly isolated virus.Your job is to culture the virus using in vitro methods.Upon observing your inoculated tissue culture specimen one day, you notice clumps of cells growing on top of the original monolayer of cells.Microscopic analysis of stained cells from the culture reveal an alteration in host cell membrane protein content and chromosomal structure.Based upon this information, you hypothesize that the virus you are studying is ______.

Accepted Answer

A)  a bacteriophage
B)  a prion
C)  a viroid
D)  an oncovirus
E)  a satellite virusF) B) and D)
G) A) and C)

Question 11

Viruses that infect bacteria are specifically called ______.

Accepted Answer

A)  viroids
B)  prions
C)  bacteriophages
D)  satellite virusesE) B) and C)
F) A) and D)

Question 12

In order to synthesize proteins, a virus with a genome comprised of single-stranded negative-sense RNA

Accepted Answer

A)  can directly translate its negative-sense RNA strand into proteins.
B)  must use reverse transcriptase to make a negative-sense DNA strand first.
C)  must use DNA polymerase to make a positive-sense DNA strand first.
D)  must use its negative-sense strand as a template to make a positive-sense RNA.E) None of the above
F) A) and C)

Question 13

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

Accepted Answer

A) True 
 B)False

Question 14

A fully formed virus that can cause an infection in a host cell is called a virion.

Accepted Answer

A) True 
 B)False

Question 15

Which of the following is not a characteristic of a transformed cell?

Accepted Answer

A)  Viral nucleic acid integrated into host DNA
B)  Decreased growth rate
C)  Alterations in chromosomes
D)  Changes in cell surface molecules
E)  Capacity to divide indefinitelyF) C) and D)
G) A) and B)

Question 16

Which of the following is not a viral order in the classification system?

Accepted Answer

A)  Caudovirales
B)  Vaccinia virus
C)  Nidovirales
D)  MononegaviralesE) None of the above
F) B) and D)

Question 17

Host range is limited by the

Accepted Answer

A)  type of nucleic acid in the virus.
B)  age of the host cell.
C)  type of host cell receptors on cell membrane.
D)  size of the host cell.E) A) and B)
F) A) and C)

Question 18

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) A) and D)

Question 19

Helical and icosahedral are terms used to describe the shape of a viral ______.

Accepted Answer

A)  spike
B)  capsomere
C)  envelope
D)  capsid
E)  coreF) A) and E)
G) A) and D)

Question 20

Viral spikes are inserted into the host cell membrane before budding or exocytosis.

Accepted Answer

A) True 
 B)False

Exam 6: An Introduction to the Viruses

Which of the following is not a characteristic of a transformed cell?

Correct Answer
verified

Viral spikes are inserted into the host cell membrane before budding or exocytosis.

Correct Answer
verified

In order to synthesize proteins, a virus with a genome comprised of single-stranded negative-sense RNA

Correct Answer
verified

Viral growth in bird embryos can cause discrete, opaque spots in the embryonic membranes called ______.

Correct Answer
verified

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 Answer
verified

Correct Answer
verified

A fully formed virus that can cause an infection in a host cell is called a virion.

Correct Answer
verified

Host range is limited by the

Correct Answer
verified

Viral spikes

Correct Answer
verified

Oncogenic viruses include all the following except ______.

Correct Answer
verified

Tamiflu is a common medication given for influenza treatment.It works by protecting and blocking sialic acid molecules on the surfaces of host cells and influenza virus envelopes as they leave the cell.Which statement reflects the mechanism of Tamiflu's action?

Correct Answer
verified

Which of the following occurs during assembly?

Correct Answer
verified

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

Correct Answer
verified

Helical and icosahedral are terms used to describe the shape of a viral ______.

Correct Answer
verified

Viruses that infect bacteria are specifically called ______.

Correct Answer
verified

Lysogeny refers to

Correct Answer
verified

All of the following pertain to virus envelopes except

Correct Answer
verified

Viral tissue specificities are called ______.

Correct Answer
verified

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 Answer
verified

Which of the following is not a viral order in the classification system?

Correct Answer
verified

Exam 6: An Introduction to the Viruses

Which of the following is not a characteristic of a transformed cell?

Correct AnswerverifiedShow Answer

Viral spikes are inserted into the host cell membrane before budding or exocytosis.

Correct AnswerverifiedShow Answer

In order to synthesize proteins, a virus with a genome comprised of single-stranded negative-sense RNA

Correct AnswerverifiedShow Answer

Viral growth in bird embryos can cause discrete, opaque spots in the embryonic membranes 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

Correct AnswerverifiedShow Answer

A fully formed virus that can cause an infection in a host cell is called a virion.

Correct AnswerverifiedShow Answer

Host range is limited by the

Correct AnswerverifiedShow Answer

Viral spikes

Correct AnswerverifiedShow Answer

Oncogenic viruses include all the following except ______.

Correct AnswerverifiedShow Answer

Tamiflu is a common medication given for influenza treatment.It works by protecting and blocking sialic acid molecules on the surfaces of host cells and influenza virus envelopes as they leave the cell.Which statement reflects the mechanism of Tamiflu's action?

Correct AnswerverifiedShow Answer

Which of the following occurs during assembly?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Helical and icosahedral are terms used to describe the shape of a viral ______.

Correct AnswerverifiedShow Answer

Viruses that infect bacteria are specifically called ______.

Correct AnswerverifiedShow Answer

Lysogeny refers to

Correct AnswerverifiedShow Answer

All of the following pertain to virus envelopes except

Correct AnswerverifiedShow Answer

Viral tissue specificities are called ______.

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

Which of the following is not a viral order in the classification system?

Correct AnswerverifiedShow Answer

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