Question 1

How are prions different from all other known infectious agents?

Accepted Answer

A)  They act as slow viruses. 
B)  They can be destroyed by incineration. 
C)  They lack nucleic acid. 
D)  They cannot reproduce outside a cell. 
E)  They cause neurological problems. 
A)  They act as slow viruses. 
B)  They can be destroyed by incineration. 
C)  They lack nucleic acid. 
D)  They cannot reproduce outside a cell. 
E)  They cause neurological problems. C

Question 2

Which of the following types of animal virus requires RNA- dependent RNA transcriptase to be replicated?

Accepted Answer

A)  +ssRNA viruses 
B)  - ssRNA viruses 
C)  dsDNA viruses 
D)  ssDNA viruses 
E)  retroviruses 
A)  +ssRNA viruses 
B)  - ssRNA viruses 
C)  dsDNA viruses 
D)  ssDNA viruses 
E)  retroviruses B

Question 3

A(n) _ is a clear zone on a bacterial lawn where cells have been killed by the activity of a bacteriophage.

Accepted Answer

plaque

Question 4

is the process of viral capsid removal within the infected cell.

Accepted Answer

The answer of is the process of viral capsid removal...

Question 5

, genes that play a role in proper cell division, may also play a role in some types of cancer.

Accepted Answer

The answer of , genes that play a role in...

Question 6

The genome of which of the following types of animal virus can act directly as mRNA?

Accepted Answer

A)  ssDNA viruses 
B)  retroviruses 
C)  dsRNA viruses 
D)  +ssRNA viruses 
E)  - ssRNA viruses 
A)  ssDNA viruses 
B)  retroviruses 
C)  dsRNA viruses 
D)  +ssRNA viruses 
E)  - ssRNA viruses

Question 7

Prusiner was the first to describe which of the following?

Accepted Answer

A)  HIV 
B)  prions 
C)  temperate phages 
D)  tobacco mosaic virus 
E)  retroviruses 
A)  HIV 
B)  prions 
C)  temperate phages 
D)  tobacco mosaic virus 
E)  retroviruses

Question 8

The phenomenon of transduction is associated with which stage of a bacteriophage life cycle?

Accepted Answer

A)  synthesis 
B)  attachment 
C)  release 
D)  entry 
E)  assembly 
A)  synthesis 
B)  attachment 
C)  release 
D)  entry 
E)  assembly

Question 9

All of the following statements concerning viruses are true EXCEPT:

Accepted Answer

A)  Viral capsids can assume one of three basic shapes. 
B)  Tobacco mosaic virus was the first virus to be discovered and characterized. 
C)  Viruses enter a cell to complete the replication they have begun extracellularly. 
D)  Some viruses have an outer membrane called an envelope. 
E)  Viruses never contain both DNA and RNA. 
A)  Viral capsids can assume one of three basic shapes. 
B)  Tobacco mosaic virus was the first virus to be discovered and characterized. 
C)  Viruses enter a cell to complete the replication they have begun extracellularly. 
D)  Some viruses have an outer membrane called an envelope. 
E)  Viruses never contain both DNA and RNA.

Question 10

Bacteriophages use the enzyme to breach the bacterial cell wall.

Accepted Answer

The answer of Bacteriophages use the enzyme to breach the...

Question 11

Infections in which viruses are shed slowly and steadily from host cells are called infections.

Accepted Answer

The answer of Infections in which viruses are shed slowly...

Question 12

An animal virus that does not have an envelope is described as a(n) virus.

Accepted Answer

The answer of An animal virus that does not have...

Question 13

The outermost layer of a virion fulfills which of the following functions of the virus?

Accepted Answer

A)  recognition 
B)  protection 
C)  replication 
D)  Both A and B are correct. 
E)  A, B, and C are correct. 
A)  recognition 
B)  protection 
C)  replication 
D)  Both A and B are correct. 
E)  A, B, and C are correct.

Question 14

Which of the following is associated with the attachment of a bacteriophage to a bacterial cell?

Accepted Answer

A)  receptor specificity 
B)  random collisions 
C)  chemical attractions 
D)  Both B and C are correct. 
E)  A, B, and C are correct. 
A)  receptor specificity 
B)  random collisions 
C)  chemical attractions 
D)  Both B and C are correct. 
E)  A, B, and C are correct.

Question 15

Which of the following is another term for a lysogenic phage?

Accepted Answer

A)  enveloped virus 
B)  retrovirus 
C)  bacteriophage 
D)  temperate phage 
E)  nucleocapsid 
A)  enveloped virus 
B)  retrovirus 
C)  bacteriophage 
D)  temperate phage 
E)  nucleocapsid

Question 16

Tumors invade other organs and tissues in a process called

Accepted Answer

A)  budding. 
B)  a plaque assay. 
C)  metastasis. 
D)  neoplasia. 
E)  latency. 
A)  budding. 
B)  a plaque assay. 
C)  metastasis. 
D)  neoplasia. 
E)  latency.

Question 17

Tobacco mosaic virus was first isolated and characterized by

Accepted Answer

A)  Iwanowski. 
B)  Stanley. 
C)  Lacks. 
D)  Rous. 
E)  Prusiner. 
A)  Iwanowski. 
B)  Stanley. 
C)  Lacks. 
D)  Rous. 
E)  Prusiner.

Question 18

Which of the following types of viruses have no extracellular state?

Accepted Answer

A)  animal viruses 
B)  fungal viruses 
C)  bacterial viruses 
D)  plant viruses 
E)  All of these have an extracellular state. 
A)  animal viruses 
B)  fungal viruses 
C)  bacterial viruses 
D)  plant viruses 
E)  All of these have an extracellular state.

Question 19

The process of excising a prophage from the host chromosome, in order to reenter the lytic phase, is called

Accepted Answer

A)  exocytosis. 
B)  induction. 
C)  lysogeny. 
D)  transduction. 
E)  metastasis. 
A)  exocytosis. 
B)  induction. 
C)  lysogeny. 
D)  transduction. 
E)  metastasis.

Question 20

Which of the following would NOT be found as a subcomponent of a bacteriophage?

Accepted Answer

A)  tail fibers 
B)  envelope 
C)  icosahedral capsid 
D)  base plate 
E)  DNA 
A)  tail fibers 
B)  envelope 
C)  icosahedral capsid 
D)  base plate 
E)  DNA

Exam 13: Characterizing and Classifying Viruses, Viroids, and Prions

How are prions different from all other known infectious agents?

Which of the following types of animal virus requires RNA- dependent RNA transcriptase to be replicated?

A(n) _ is a clear zone on a bacterial lawn where cells have been killed by the activity of a bacteriophage.

is the process of viral capsid removal within the infected cell.

, genes that play a role in proper cell division, may also play a role in some types of cancer.

The genome of which of the following types of animal virus can act directly as mRNA?

Prusiner was the first to describe which of the following?

The phenomenon of transduction is associated with which stage of a bacteriophage life cycle?

All of the following statements concerning viruses are true EXCEPT:

Bacteriophages use the enzyme to breach the bacterial cell wall.

Infections in which viruses are shed slowly and steadily from host cells are called infections.

An animal virus that does not have an envelope is described as a(n) virus.

The outermost layer of a virion fulfills which of the following functions of the virus?

Which of the following is associated with the attachment of a bacteriophage to a bacterial cell?

Which of the following is another term for a lysogenic phage?

Tumors invade other organs and tissues in a process called

Tobacco mosaic virus was first isolated and characterized by

Which of the following types of viruses have no extracellular state?

The process of excising a prophage from the host chromosome, in order to reenter the lytic phase, is called

Which of the following would NOT be found as a subcomponent of a bacteriophage?

A Brief History of Microbiology

The Chemistry of Microbiology

Cell Structure and Function

Microscopy, Staining, and Classification

Microbial Metabolism

Microbial Nutrition and Growth

Microbial Genetics

Recombinant Dna Technology

Controlling Microbial Growth in the Environment

Controlling Microbial Growth in the Body: Antimicrobial Drugs

Characterizing and Classifying Prokaryotes

Characterizing and Classifying Eukaryotes

Infection, Infectious Diseases, and Epidemiology

Innate Immunity

Adaptive Immunity

Immunization and Immune Testing

Aids and Other Immune Disorders

Microbial Diseases of the Skin and Wounds

Microbial Diseases of the Nervous System and Eyes

Microbial Cardiovascular and Systemic Diseases

Microbial Diseases of the Respiratory System

Microbial Diseases of the Digestive System

Microbial Diseases of the Urinary and Reproductive Systems

Applied and Environmental Microbiology

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