Question 1

Noneveloped viruses enter their animal host cell via an active process that requires the participation of the animal cell.

Accepted Answer

A) True 
 B)False

Question 2

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) A) and E)
G) B) and D) B

Question 3

Which body system is mainly affected by Creutzfeldt-Jakob disease?

Accepted Answer

A)  digestive system
B)  genitourinary system
C)  nervous system
D)  circulatory system
E)  respiratory systemF) A) and B)
G) B) and D)

Question 4

A naked virus does not have a(n) _____.

Accepted Answer

The answer of A naked virus does not have a(n)...

Question 5

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

Accepted Answer

A) True 
 B)False

Question 6

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

Accepted Answer

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

Question 7

Clostridium botulinum is made virulent by incorporated prophage genes encoding the botulinum toxin.What term describes this process?

Accepted Answer

A)  lytic phase
B)  budding
C)  adsorption
D)  lysogenic conversion
E)  latent phaseF) A) and B)
G) B) and E)

Question 8

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 D)
G) A) and E)

Question 9

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

Accepted Answer

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

Question 10

Viral infections are easier to treat with drugs than bacterial infections.

Accepted Answer

A) True 
 B)False

Question 11

Freshly isolated animal tissue that is placed in a growth medium and allowed to produce a cell monolayer is referred to as a _____ cell culture.

Accepted Answer

The answer of Freshly isolated animal tissue that is placed...

Question 12

All of the following are characteristics of viruses except

Accepted Answer

A)  they can be crystallized.
B)  they often have a geometric capsid.
C)  they have a viscous fluid inside their capsids.
D)  they can cause fatal diseases.
E)  they can cause mild diseases.F) All of the above
G) C) and D)

Question 13

A(n) _____ is the protein shell around the nucleic acid core of a virus.

Accepted Answer

The answer of A(n) _____ is the protein shell around...

Question 14

What tool or technique used by Ivanowski and Beijerinck while studying diseased tobacco plants enabled them to determine that the disease was caused by an agent significantly smaller than bacteria?

Accepted Answer

A)  scanning electron microscopy that enabled them to view the virus the tobacco mosaic virus
B)  transmission electron microscopy that allowed them to view the tobacco mosaic virus
C)  porcelain filters that trapped bacteria but allowed passage of the virus
D)  cell culture that enabled cultivation of the virusE) B) and D)
F) A) and B)

Question 15

One of the principal capsid shapes is a 20-sided figure with 12 evenly spaced corners referred to as a(n) _____
capsid.

Accepted Answer

icosahedral

Question 16

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) C) and D)
G) B) and E)

Question 17

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) B) and C)
G) All of the above

Question 18

The correct sequence of events in viral multiplication is

Accepted Answer

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

Question 19

The virus-induced, specific damage to the host cell that can be seen in a light microscope is called

Accepted Answer

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

Question 20

Which type of virus is most likely to cause the immediate damage and destruction of an infected animal cell when it is released?

Accepted Answer

A)  enveloped virus
B)  RNA virus
C)  nonenveloped virus
D)  DNA virusE) A) and B)
F) A) and C) C

Exam 6: An Introduction to Viruses

Noneveloped viruses enter their animal host cell via an active process that requires the participation of the animal cell.

Correct AnswerverifiedShow Answer

Oncogenic viruses include all the following except

Correct AnswerverifiedB

Which body system is mainly affected by Creutzfeldt-Jakob disease?

Correct AnswerverifiedShow Answer

A naked virus does not have a(n) _____.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Clostridium botulinum is made virulent by incorporated prophage genes encoding the botulinum toxin.What term describes this process?

Correct AnswerverifiedShow Answer

When a virus enters a lysogenic phase, it means

Correct AnswerverifiedShow 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

Viral infections are easier to treat with drugs than bacterial infections.

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 _____ cell culture.

Correct AnswerverifiedShow Answer

All of the following are characteristics of viruses except

Correct AnswerverifiedShow Answer

A(n) _____ is the protein shell around the nucleic acid core of a virus.

Correct AnswerverifiedShow Answer

What tool or technique used by Ivanowski and Beijerinck while studying diseased tobacco plants enabled them to determine that the disease was caused by an agent significantly smaller than bacteria?

Correct AnswerverifiedShow Answer

One of the principal capsid shapes is a 20-sided figure with 12 evenly spaced corners referred to as a(n) _____ capsid.

Correct Answerverifiedicosahedral

T-even phages

Correct AnswerverifiedShow Answer

Host cells of viruses include

Correct AnswerverifiedShow Answer

The correct sequence of events in viral multiplication is

Correct AnswerverifiedShow Answer

The virus-induced, specific damage to the host cell that can be seen in a light microscope is called

Correct AnswerverifiedShow Answer

Which type of virus is most likely to cause the immediate damage and destruction of an infected animal cell when it is released?

Correct AnswerverifiedC

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B

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Answered by ExamLex AI
1. Non-cellular structure: Unlike other ...
View Answer

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icosahedral

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C