Question 1

In the region of budding,the inside of the plasma membrane becomes coated with

Accepted Answer

A)  enzymes.
B)  carbohydrates.
C)  steroids.
D)  matrix proteins.E) B) and C)
F) None of the above

Question 2

Virulent as well as temperate phages can serve as generalized transducing phages.

Accepted Answer

A) True 
 B)False

Question 3

Viruses that cause acute infection result in productive infections.

Accepted Answer

A) True 
 B)False

Question 4

An exit method used by viruses that does not immediately destroy the host bacterium is

Accepted Answer

A)  lysis.
B)  inversion.
C)  extrusion.
D)  excising.E) A) and B)
F) A) and C)

Question 5

Genetic exchange in segmented viruses that allows a zoonotic virus to infect humans is termed

Accepted Answer

A)  antigenic shift.
B)  hemagglutination.
C)  genetic reassortment.
D)  antigenic drift.E) A) and C)
F) None of the above

Question 6

Prions affect the

Accepted Answer

A)  respiratory system.
B)  gastrointestinal tract.
C)  nervous system.
D)  lymphatic system.E) A) and D)
F) A) and C)

Question 7

The common species name of the virus is based on the

Accepted Answer

A)  presence or absence of a nuclear membrane.
B)  type of nucleic acid it contains.
C)  disease the virus causes.
D)  geographic area it is found.E) None of the above
F) A) and B)

Question 8

What is a defective phage?

Accepted Answer

A)  A virus that has lost some of its genetic material,and therefore cannot infect a new target cell
B)  A virus that has lost some of its genetic material,and therefore cannot replicate within a new target cell
C)  A virus that lacks the ability to replicate independently of its host cell
D)  A virus that cannot attach to its host cellE) A) and D)
F) All of the above

Question 9

Capsids are made of a number of capsomeres that are covalently bonded to one another.

Accepted Answer

A) True 
 B)False

Question 10

Transducing virulent phages do not lyse the cells they invade because

Accepted Answer

A)  transformation is taking place in the phage and this is transferred to the bacterium.
B)  bacterial DNA has replaced critical viral DNA in the phage.
C)  their virulence is dependent on the bacteria and virus replicating together.
D)  the lytic genes are unable to enter during penetration and are shed outside the host.E) All of the above
F) B) and C)

Question 11

The integration of phage DNA into the bacterial chromosome occurs because of

Accepted Answer

A)  the phage's ability to synthesize an enzyme that integrates its DNA into the host's chromosome.
B)  the phage's ability to synthesize enzymes to enter the bacterium.
C)  similar RNA nucleotides in both.
D)  the similarity in enzyme metabolism.
E)  the phage's ability to synthesize enzymes to enter the bacterium AND similar RNA nucleotides in both.F) A) and E)
G) B) and E)

Question 12

Cells taken from a tumor

Accepted Answer

A)  may be used to grow viruses.
B)  can be cultivated in vitro indefinitely.
C)  may be used to grow bacteriophages.
D)  divide 50 times and then die.
E)  may be used to grow viruses AND can be cultivated in vitro indefinitely.F) D) and E)
G) None of the above

Question 13

Prions

Accepted Answer

A)  consist of a special nucleocapsid.
B)  are made of protein only.
C)  are made of RNA only.
D)  are made of dsRNA and protein.E) A) and D)
F) A) and C)

Question 14

One group of animal viruses that are able to agglutinate red blood cells are the

Accepted Answer

A)  coronavirus.
B)  retrovirus.
C)  reovirus.
D)  orthomyxovirus.E) A) and C)
F) B) and C)

Question 15

Most phages that contain single-stranded DNA

Accepted Answer

A)  are extruded.
B)  contain a positive-sense DNA strand.
C)  have their DNA transformed to double-stranded DNA before replication and transcription occur.
D)  All of the choices are correct.E) All of the above
F) B) and C)

Question 16

The phenomenon responsible for the ability of Corynebacterium diphtherium to produce the virulent toxin responsible for the devastating effects of diphtheria is called

Accepted Answer

A)  self-assembly.
B)  matrix conversion.
C)  prion protein.
D)  lysogenic conversion.E) A) and B)
F) None of the above

Question 17

For which of the following processes are enzymes not required?

Accepted Answer

A)  Replication
B)  Translation
C)  Maturation
D)  Self-assemblyE) A) and B)
F) A) and C)

Question 18

If a virus utilizes a lytic life cycle of reproduction,it will not induce tumors.

Accepted Answer

A) True 
 B)False

Question 19

The enveloped viruses typically obtain their envelope

Accepted Answer

A)  from the host plasma membrane.
B)  as they exit the host.
C)  from a newly constructed viral-derived membrane.
D)  from the nuclear membrane.
E)  from the host plasma membrane AND as they exit the host.F) B) and C)
G) A) and B)

Question 20

The shape of the virus is determined by its

Accepted Answer

A)  nucleic acid.
B)  capsid.
C)  envelope.
D)  tail.E) C) and D)
F) All of the above

Exam 13: Viruses, Viroids, and Prions

For which of the following processes are enzymes not required?

Correct AnswerverifiedShow Answer

The shape of the virus is determined by its

Correct AnswerverifiedShow Answer

An exit method used by viruses that does not immediately destroy the host bacterium is

Correct AnswerverifiedShow Answer

Capsids are made of a number of capsomeres that are covalently bonded to one another.

Correct AnswerverifiedShow Answer

What is a defective phage?

Correct AnswerverifiedShow Answer

Prions

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Genetic exchange in segmented viruses that allows a zoonotic virus to infect humans is termed

Correct AnswerverifiedShow Answer

If a virus utilizes a lytic life cycle of reproduction,it will not induce tumors.

Correct AnswerverifiedShow Answer

Cells taken from a tumor

Correct AnswerverifiedShow Answer

Virulent as well as temperate phages can serve as generalized transducing phages.

Correct AnswerverifiedShow Answer

Transducing virulent phages do not lyse the cells they invade because

Correct AnswerverifiedShow Answer

Most phages that contain single-stranded DNA

Correct AnswerverifiedShow Answer

Viruses that cause acute infection result in productive infections.

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The integration of phage DNA into the bacterial chromosome occurs because of

Correct AnswerverifiedShow Answer

The enveloped viruses typically obtain their envelope

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The common species name of the virus is based on the

Correct AnswerverifiedShow Answer

The phenomenon responsible for the ability of Corynebacterium diphtherium to produce the virulent toxin responsible for the devastating effects of diphtheria is called

Correct AnswerverifiedShow Answer

In the region of budding,the inside of the plasma membrane becomes coated with

Correct AnswerverifiedShow Answer

Prions affect the

Correct AnswerverifiedShow Answer

One group of animal viruses that are able to agglutinate red blood cells are the

Correct AnswerverifiedShow Answer

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