Question 1

Oncogenic viruses include all the following except

Accepted Answer

A)   Hepatitis B virus.
B)   Measles virus.
C)   Papillomavirus.
D)   HTLVI and HTLVII viruses.
E)   Epstein-Barr virus.F) B) and E)
G) A) and E)

Question 2

Which of the following viral types enter animal cells via fusion with the animal cell membrane?

Accepted Answer

A)   enveloped viruses
B)   non enveloped viruses
C)   naked viruses
D)   All of these choices are correct.E) All of the above
F) A) and B)

Question 3

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 4

All of the following are characteristics of viruses except

Accepted Answer

A)   definite shape.
B)   metabolism.
C)   genes.
D)   ability to infect host cells.
E)   ultramicroscopic size.F) A) and C)
G) A) and E)

Question 5

Visible, clear, well-defined patches in a monolayer of virus-infected cells in a culture are called

Accepted Answer

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

Question 6

Explain what is meant by host range, what governs host range, and what is meant by tissue tropism.

Accepted Answer

Host range refers to the range of differ...

Question 7

The three basic groups of viruses based on morphology include

Accepted Answer

A)   enveloped viruses, non enveloped viruses, and complex viruses.
B)   enveloped viruses, DNA viruses, and non enveloped viruses.
C)   helical viruses, round viruses, and enveloped viruses.
D)   non enveloped viruses, RNA viruses, and bacteriophages.E) C) and D)
F) All of the above

Question 8

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 9

T-even phages

Accepted Answer

A)   include the poxviruses.
B)   infect Escherichia coli cells.
C)   enter host cells by engulfment.
D)   have helical capsids.
E)   All of these choices are correct.F) D) and E)
G) A) 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

Discuss the criteria used for classifying viruses into families and genera.

Accepted Answer

Viruses are classified into families and...

Question 12

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

Accepted Answer

A) True 
 B)False

Question 13

When a virus enters a lysogenic phase, it means

Accepted Answer

A)   the virus is integrated into the DNA of the host cell and is latent.
B)   the virus is bursting through the host cell membrane.
C)   the virus is starting biosynthesis of its nucleic acid.
D)   the virus will remain in circulation and not continue infecting its host.
E)   the number of viruses in the host is decreasing as the immune system becomes effective.F) B) and C)
G) None of the above

Question 14

The nucleocapsid consists of

Accepted Answer

A)   the capsomers assembled into the capsid.
B)   the nucleic acid of the virus only.
C)   the nucleic acid along with the capsid.
D)   the envelope and capsid.
E)   the envelope, nucleic acid, and capsid.F) A) and B)
G) C) and E)

Question 15

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) B) and C)
G) A) and B)

Question 16

A common method for cultivating viruses in the lab is to use in vitro systems called _____ cultures.

Accepted Answer

The answer of A common method for cultivating viruses in...

Question 17

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 18

Host cells of viruses include

Accepted Answer

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

Question 19

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) C) and D)
F) All of the above

Question 20

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) A) and B)
G) C) and D)

Exam 6: An Introduction to Viruses

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

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When a virus enters a lysogenic phase, it means

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

Correct AnswerverifiedShow Answer

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

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

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Oncogenic viruses include all the following except

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The three basic groups of viruses based on morphology include

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Host cells of viruses include

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A common method for cultivating viruses in the lab is to use in vitro systems called _____ cultures.

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The nucleocapsid consists of

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Which of the following viral types enter animal cells via fusion with the animal cell membrane?

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All of the following are characteristics of viruses except

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T-even phages

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Explain what is meant by host range, what governs host range, and what is meant by tissue tropism.

Correct AnswerAnswered by ExamLex AIHost range refers to the range of differ...View AnswerShow Answer

Visible, clear, well-defined patches in a monolayer of virus-infected cells in a culture are called

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

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Satellite viruses are

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Discuss the criteria used for classifying viruses into families and genera.

Correct AnswerAnswered by ExamLex AIViruses are classified into families and...View AnswerShow Answer

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

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The origins of viruses have been a topic...
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Host range refers to the range of differ...
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Correct Answer
Answered by ExamLex AI
Viruses are classified into families and...
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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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Correct Answer
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