Question 1

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

Accepted Answer

A) True 
 B)False

Question 2

Satellite viruses are

Accepted Answer

A)  also called viroids.
B)  dependent on other viruses for replication.
C)  the cause of spongiform encephalopathies.
D)  significant pathogens of plants.
E)  All of these choices are correct.F) A) and B)
G) D) and E)

Question 3

Which of the following will not support viral cultivation?

Accepted Answer

A)  live lab animals
B)  embryonated bird eggs
C)  primary cell cultures
D)  continuous cell cultures
E)  blood agarF) B) and C)
G) B) and E)

Question 4

Select the FALSE statement about viruses.

Accepted Answer

A)  Cellular life-forms most likely preceded the origin of viruses since viruses need host cells in which to develop and reproduce.
B)  Viruses are the most numerous microbes on Earth.
C)  Viruses have impacted the evolution of all other cellular life-forms including bacteria, achaeans, and eukaryotes.
D)  When viruses are treated in a way that prevents them from entering host cells and reproducing, they are said to be dead.E) A) and C)
F) A) and B)

Question 5

When used in a description of viruses, the term replication includes

Accepted Answer

A)  the production of multiple copies of a virus by a host cell.
B)  the copying of the viral DNA in a DNA virus.
C)  the copying of the genomic RNA in an RNA virus.
D)  All of these choices are correct.E) B) and D)
F) B) and C)

Question 6

Which of the following is not associated with every virus?

Accepted Answer

A)  envelope
B)  capsomers
C)  capsid
D)  nucleic acid
E)  GenomeF) C) and E)
G) A) and D)

Question 7

In general, most DNA viruses multiply in the host cell's _____, while most RNA viruses multiply in the host cell's _____.

Accepted Answer

A)  nucleus; cytoplasm
B)  cytoplasm; cell membrane
C)  cell membrane; cytoplasm
D)  cytoplasm; nucleus
E)  nucleus; endoplasmic reticulumF) A) and D)
G) D) and E)

Question 8

All of the following pertain to virus envelopes except they

Accepted Answer

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

Question 9

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 agents.F) A) and D)
G) B) and D)

Question 10

Discuss theories regarding the origins of viruses and make a case for whether viruses originated before cellular life-forms or after cellular life-forms.

Accepted Answer

The origins of viruses have been a topic...

Question 11

Viruses with _____ sense RNA contain the correct message for translation, while viruses with _____ sense RNA must first be converted into a correct message.

Accepted Answer

The answer of Viruses with _____ sense RNA contain the...

Question 12

The Adeno-Associated Virus (AAV) and the Delta Agent are prions.

Accepted Answer

A) True 
 B)False

Question 13

Which of these structures are used by bacteriophages to attach to host cell receptors?

Accepted Answer

A)  sheath
B)  tail fibers
C)  nucleic acid
D)  capsid headE) A) and B)
F) B) and C)

Question 14

No cases of variant Creutzfeldt-Jakob syndrome linked to eating infected cows have occurred in the United States.

Accepted Answer

A) True 
 B)False

Question 15

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

Accepted Answer

A)  lysogeny.
B)  budding.
C)  plaques.
D)  cytopathic effects.
E)  pocks.F) B) and E)
G) B) and C)

Question 16

Viruses belong to which of the following Kingdoms?

Accepted Answer

A)  Protists
B)  Fungi
C)  Archaea
D)  Bacteria
E)  None of the choices are correct.F) A) and D)
G) All of the above

Question 17

Viral capsids are made from subunits called

Accepted Answer

A)  envelopes.
B)  spikes.
C)  capsomers.
D)  prophages.
E)  peplomers.F) D) and E)
G) A) and E)

Question 18

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

Accepted Answer

A) True 
 B)False

Question 19

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

Accepted Answer

A) True 
 B)False

Question 20

Creutzfeldt-Jakob disease is

Accepted Answer

A)  caused by a chronic latent virus.
B)  initiated by an oncogenic virus.
C)  caused by a viroid.
D)  a spongiform encephalopathy of humans.
E)  also called "Mad Cow disease".F) B) and D)
G) C) and E)

Exam 6: An Introduction to Viruses

When used in a description of viruses, the term replication includes

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No cases of variant Creutzfeldt-Jakob syndrome linked to eating infected cows have occurred in the United States.

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

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Select the FALSE statement about viruses.

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Satellite viruses are

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Which of the following is not associated with every virus?

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All of the following pertain to virus envelopes except they

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

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Discuss theories regarding the origins of viruses and make a case for whether viruses originated before cellular life-forms or after cellular life-forms.

Correct AnswerAnswered by ExamLex AIThe origins of viruses have been a topic...View AnswerShow Answer

Which of the following will not support viral cultivation?

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Viral capsids are made from subunits called

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Viruses belong to which of the following Kingdoms?

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Creutzfeldt-Jakob disease is

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

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

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

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The Adeno-Associated Virus (AAV) and the Delta Agent are prions.

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Viruses with _____ sense RNA contain the correct message for translation, while viruses with _____ sense RNA must first be converted into a correct message.

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Which of these structures are used by bacteriophages to attach to host cell receptors?

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In general, most DNA viruses multiply in the host cell's _____, while most RNA viruses multiply in the host cell's _____.

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Answered by ExamLex AI
The origins of viruses have been a topic...
View Answer

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Viruses with _ sense RNA contain the correct message for translation, while viruses with _ sense RNA must first be converted into a correct message.

Correct Answer
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Correct Answer
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In general, most DNA viruses multiply in the host cell's _, while most RNA viruses multiply in the host cell's _.

Correct Answer
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