Question 1

Discuss at least six characteristics that are unique to viruses compared to other microorganisms.

Accepted Answer

1. Non-cellular structure: Unlike other ...

Question 2

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

Accepted Answer

Viruses are classified into families and...

Question 3

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 4

Bacteriophages do not undergo adsorption to specific host cell receptors prior to penetration.

Accepted Answer

A) True 
 B)False

Question 5

Diagnosis of viral infections sometimes involves analyzing the patient's blood for specific _____ that the immune system produced against the virus.

Accepted Answer

The answer of Diagnosis of viral infections sometimes involves analyzing...

Question 6

Infectious naked strands of RNA are called

Accepted Answer

A)  viroids.
B)  phages.
C)  prions.
D)  oncogenic viruses.
E)  spikes.F) B) and C)
G) None of the above

Question 7

Which of the following is correct about viruses?

Accepted Answer

A)  cannot be seen with a light microscope
B)  are prokaryotic
C)  contain 70S ribosomes
D)  undergo binary fission
E)  can be grown on nutrient agarF) A) and B)
G) D) and E)

Question 8

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 C)
G) C) and D)

Question 9

Which is incorrect about prophages?

Accepted Answer

A)  present when the virus is in lysogeny
B)  formed when viral DNA enters the bacterial chromosome
C)  replicated with host DNA and passed on to progeny
D)  cause lysis of host cells
E)  occur when temperate phages enter host cellsF) B) and E)
G) A) and E)

Question 10

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 11

Spikes are glycoproteins of the virus capsid.

Accepted Answer

A) True 
 B)False

Question 12

Discuss why it is difficult to trace the origins of viruses and why they are important.

Accepted Answer

Tracing the origins of viruses can be di...

Question 13

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 14

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) C) and E)
G) None of the above

Question 15

The event that occurs in bacteriophage multiplication that does not occur in animal virus replication is

Accepted Answer

A)  adsorption to the host cells.
B)  injection of the viral nucleic acid into the host cell.
C)  host cell synthesis of viral enzymes and capsid proteins.
D)  assembly of nucleocapsids.
E)  replication of viral nucleic acid.F) All of the above
G) A) and B)

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 E)
G) C) and E)

Question 17

Which of the following viruses did D. Ivanovski and M. Beijerinck work with?

Accepted Answer

A)  Rabies
B)  Smallpox
C)  Tobacco Mosaic Virus
D)  Herpes
E)  Epstein-Barr virusF) A) and C)
G) A) and E)

Question 18

Viruses acquire envelopes around their nucleocapsids during

Accepted Answer

A)  replication.
B)  assembly.
C)  adsorption.
D)  release.
E)  penetration.F) A) and B)
G) A) and C)

Question 19

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) B) and D)

Question 20

The core of every virus particle always contains

Accepted Answer

A)  DNA.
B)  capsomers.
C)  enzymes.
D)  DNA and RNA.
E)  either DNA or RNA.F) B) and D)
G) A) and D)

Exam 6: An Introduction to Viruses

The event that occurs in bacteriophage multiplication that does not occur in animal virus replication is

Correct AnswerverifiedShow Answer

Which of the following will not support viral cultivation?

Correct AnswerverifiedShow Answer

Which of the following is correct about viruses?

Correct AnswerverifiedShow Answer

Viruses belong to which of the following Kingdoms?

Correct AnswerverifiedShow Answer

Viruses acquire envelopes around their nucleocapsids during

Correct AnswerverifiedShow Answer

Diagnosis of viral infections sometimes involves analyzing the patient's blood for specific _____ that the immune system produced against the virus.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Which is incorrect about prophages?

Correct AnswerverifiedShow Answer

Spikes are glycoproteins of the virus capsid.

Correct AnswerverifiedShow Answer

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

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

The core of every virus particle always contains

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Bacteriophages do not undergo adsorption to specific host cell receptors prior to penetration.

Correct AnswerverifiedShow Answer

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

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

Discuss at least six characteristics that are unique to viruses compared to other microorganisms.

Correct AnswerAnswered by ExamLex AI1. Non-cellular structure: Unlike other ...View AnswerShow Answer

Which of the following viruses did D. Ivanovski and M. Beijerinck work with?

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The nucleocapsid consists of

Correct AnswerverifiedShow Answer

Discuss why it is difficult to trace the origins of viruses and why they are important.

Correct AnswerAnswered by ExamLex AITracing the origins of viruses can be di...View AnswerShow Answer

Infectious naked strands of RNA are called

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Answered by ExamLex AI
Viruses are classified into families and...
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1. Non-cellular structure: Unlike other ...
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Tracing the origins of viruses can be di...
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