Question 1

Protozoa are susceptible to viral attack.

Accepted Answer

A) True 
 B)False  True

Question 2

The number of new bacteriophages released from each infected cell is called the __________ size.

Accepted Answer

burst

Question 3

Which of the following is matched incorrectly?

Accepted Answer

A)  poliovirus - direct penetration 
B)  herpesvirus - endocytosis 
C)  adenovirus - membrane fusion 
D)  measles virus - membrane fusion 
E)  HIV - membrane fusion 
A)  poliovirus - direct penetration 
B)  herpesvirus - endocytosis 
C)  adenovirus - membrane fusion 
D)  measles virus - membrane fusion 
E)  HIV - membrane fusion C

Question 4

In enveloped viruses, virus-encoded __________ proteins are required for the assembly of the envelope around the capsid.

Accepted Answer

The answer of In enveloped viruses, virus-encoded __________ proteins are...

Question 5

Who was the first person to demonstrate the existence of viruses?

Accepted Answer

A)  Stanley 
B)  Rous 
C)  Lacks 
D)  Ivanowsky 
E)  Prusiner 
A)  Stanley 
B)  Rous 
C)  Lacks 
D)  Ivanowsky 
E)  Prusiner

Question 6

The phenomenon of transduction is associated with which of the stages of a bacteriophage infection cycle?

Accepted Answer

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

Question 7

Which of the following statements comparing virus classification and taxonomy of organisms is true?

Accepted Answer

A)  Both viruses and organisms are organized into classes. 
B)  The common names of viruses are their genus and species epithet, as they are with organisms. 
C)  Both viruses and organisms are organized into domains. 
D)  Genus and specific epithet are used in both classification systems. 
E)  Only families are common to both viral classification and organism taxonomy. 
A)  Both viruses and organisms are organized into classes. 
B)  The common names of viruses are their genus and species epithet, as they are with organisms. 
C)  Both viruses and organisms are organized into domains. 
D)  Genus and specific epithet are used in both classification systems. 
E)  Only families are common to both viral classification and organism taxonomy.

Question 8

Genes that play a role in proper cell division but may also play a role in some types of cancer are called __________.

Accepted Answer

The answer of Genes that play a role in proper...

Question 9

The combination of a virus's protein coat and nucleic acid core is called the __________.

Accepted Answer

The answer of The combination of a virus's protein coat...

Question 10

Describe the difference between lysogeny and latency.

Accepted Answer

Lysogeny is associated with certain bact

Question 11

Virus RNA that can act directly as mRNA is __________-strand RNA.

Accepted Answer

The answer of Virus RNA that can act directly as...

Question 12

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

Accepted Answer

A)  protection 
B)  recognition 
C)  replication 
D)  protection and recognition 
E)  recognition and replication 
A)  protection 
B)  recognition 
C)  replication 
D)  protection and recognition 
E)  recognition and replication

Question 13

Viruses cause most human cancers.

Accepted Answer

A) True 
 B)False

Question 14

How are fungal viruses different from viruses that infect other organisms?

Accepted Answer

A)  they have no extracellular state. 
B)  they have only DNA for genetic material. 
C)  they have no capsid. 
D)  they have no intracellular state. 
E)  they cannot pass through a filter. 
A)  they have no extracellular state. 
B)  they have only DNA for genetic material. 
C)  they have no capsid. 
D)  they have no intracellular state. 
E)  they cannot pass through a filter.

Question 15

A scientist discovers a new virus associated with a cancer. She is able to culture it in the laboratory and characterize it. The virions contain an RNA genome and enzymes with reverse transcriptase activity. What do these observations suggest about the classification of the new virus? What does this suggest regarding a mechanism for causing cancer?

Accepted Answer

The new virus is likely to be a retrovir

Question 16

Which of the following agents is capable of inducing conversion of a prophage back to a lytic phage?

Accepted Answer

A)  UV light 
B)  X rays 
C)  presence of +ssRNA 
D)  UV light and X rays 
E)  UV light and +ssRNA 
A)  UV light 
B)  X rays 
C)  presence of +ssRNA 
D)  UV light and X rays 
E)  UV light and +ssRNA

Question 17

During __________, viruses remain dormant in a cell.

Accepted Answer

A)  budding 
B)  latency 
C)  lytic replication 
D)  persistent infection 
E)  oncogenesis 
A)  budding 
B)  latency 
C)  lytic replication 
D)  persistent infection 
E)  oncogenesis

Question 18

Three __________ represent the highest level of taxonomic rank used in classifying viruses.

Accepted Answer

The answer of Three __________ represent the highest level of...

Question 19

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

Accepted Answer

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

Question 20

Many diseases of plants are caused by infectious RNA molecules lacking capsids.

Accepted Answer

A) True 
 B)False

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

Protozoa are susceptible to viral attack.

The number of new bacteriophages released from each infected cell is called the __________ size.

Which of the following is matched incorrectly?

In enveloped viruses, virus-encoded __________ proteins are required for the assembly of the envelope around the capsid.

Who was the first person to demonstrate the existence of viruses?

The phenomenon of transduction is associated with which of the stages of a bacteriophage infection cycle?

Which of the following statements comparing virus classification and taxonomy of organisms is true?

Genes that play a role in proper cell division but may also play a role in some types of cancer are called __________.

The combination of a virus's protein coat and nucleic acid core is called the __________.

Describe the difference between lysogeny and latency.

Virus RNA that can act directly as mRNA is __________-strand RNA.

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

Viruses cause most human cancers.

How are fungal viruses different from viruses that infect other organisms?

Which of the following agents is capable of inducing conversion of a prophage back to a lytic phage?

During __________, viruses remain dormant in a cell.

Three __________ represent the highest level of taxonomic rank used in classifying viruses.

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

Many diseases of plants are caused by infectious RNA molecules lacking capsids.

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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