Question 1

A viroid is a(n)

Accepted Answer

A) complete,infectious virus particle. 
B) infectious piece of RNA without a capsid. 
C) capsid without nucleic acid. 
D) provirus. 
E) infectious protein. 
A) complete,infectious virus particle. 
B) infectious piece of RNA without a capsid. 
C) capsid without nucleic acid. 
D) provirus. 
E) infectious protein.

Question 2

Which of the following is NOT utilized to culture viruses?

Accepted Answer

A) laboratory animals 
B) culture media 
C) embryonated eggs 
D) animal cell cultures 
E) bacterial cultures 
A) laboratory animals 
B) culture media 
C) embryonated eggs 
D) animal cell cultures 
E) bacterial cultures

Question 3

Figure 13.1
  
-The morphological types of viruses illustrated in Figure 13.1 are ultimately determined by the

Accepted Answer

A) nucleic acid. 
B) envelope. 
C) capsomeres. 
D) viroids. 
E) membrane spikes. 
A) nucleic acid. 
B) envelope. 
C) capsomeres. 
D) viroids. 
E) membrane spikes.

Question 4

Bacteriophages and animal viruses do NOT differ significantly in which one of the following steps?

Accepted Answer

A) attachment 
B) penetration 
C) uncoating 
D) biosynthesis 
E) release 
A) attachment 
B) penetration 
C) uncoating 
D) biosynthesis 
E) release

Question 5

How do all viruses differ from bacteria?

Accepted Answer

A) Viruses are filterable. 
B) Viruses are obligate intracellular parasites. 
C) Viruses do not have any nucleic acid. 
D) Viruses are not composed of cells. 
E) Viruses do not reproduce. 
A) Viruses are filterable. 
B) Viruses are obligate intracellular parasites. 
C) Viruses do not have any nucleic acid. 
D) Viruses are not composed of cells. 
E) Viruses do not reproduce.

Question 6

Assume you have isolated an unknown virus.This virus has a single,positive sense strand of RNA,and possesses an envelope.To which group does it most likely belong?

Accepted Answer

A) herpesvirus 
B) picornavirus 
C) retrovirus 
D) togavirus 
E) papovavirus 
A) herpesvirus 
B) picornavirus 
C) retrovirus 
D) togavirus 
E) papovavirus

Question 7

A viroid is a completely developed infectious agent composed of nucleic acid and surrounded by a capsid.

Accepted Answer

A) True 
 B)False

Question 8

What is NOT true regarding viruses that infect plants?

Accepted Answer

A) They can spread via pollination. 
B) They must enter through a wound or be introduced by an inset feeding. 
C) They can sometimes be cultured in insect cells. 
D) They are often cultured in embryonated chicken eggs. 
E) They are morphologically similar to animal viruses. 
A) They can spread via pollination. 
B) They must enter through a wound or be introduced by an inset feeding. 
C) They can sometimes be cultured in insect cells. 
D) They are often cultured in embryonated chicken eggs. 
E) They are morphologically similar to animal viruses.

Question 9

Why do most scientists agree that viruses are nonliving entities?

Accepted Answer

A) They cannot replicate outside host cells. 
B) They are composed of relatively simple components. 
C) They pass through filters. 
D) They cause diseases in host cells. 
E) They are not composed of cells. 
A) They cannot replicate outside host cells. 
B) They are composed of relatively simple components. 
C) They pass through filters. 
D) They cause diseases in host cells. 
E) They are not composed of cells.

Question 10

Which of the following statements about viruses is FALSE?

Accepted Answer

A) Viruses contain DNA or RNA but never both. 
B) Viruses contain a protein coat. 
C) Viruses use the anabolic machinery of the cell. 
D) Viruses use their own catabolic enzymes. 
E) Viruses have genes. 
A) Viruses contain DNA or RNA but never both. 
B) Viruses contain a protein coat. 
C) Viruses use the anabolic machinery of the cell. 
D) Viruses use their own catabolic enzymes. 
E) Viruses have genes.

Question 11

Glycoprotein spikes are found on the capsids of all viruses.

Accepted Answer

A) True 
 B)False

Question 12

Most RNA viruses carry which of the following enzymes?

Accepted Answer

A) DNA-dependent DNA polymerase 
B) lysozyme 
C) RNA-dependent RNA polymerase 
D) reverse transcriptase 
E) ATP synthase 
A) DNA-dependent DNA polymerase 
B) lysozyme 
C) RNA-dependent RNA polymerase 
D) reverse transcriptase 
E) ATP synthase

Question 13

An example of a latent viral infection is

Accepted Answer

A) subacute sclerosing panencephalitis. 
B) cold sores. 
C) influenza. 
D) smallpox. 
E) mumps. 
A) subacute sclerosing panencephalitis. 
B) cold sores. 
C) influenza. 
D) smallpox. 
E) mumps.

Question 14

What is the key characteristic of a transformed cell?

Accepted Answer

A) has acquired tumor-forming properties 
B) is producing toxins affecting neighboring cells 
C) is producing budding viruses 
D) has undergone chromosomal rearrangements 
E) is infected with a lytic virus 
A) has acquired tumor-forming properties 
B) is producing toxins affecting neighboring cells 
C) is producing budding viruses 
D) has undergone chromosomal rearrangements 
E) is infected with a lytic virus

Question 15

Figure 13.1
  
-In Figure 13.1,which structure is a complex virus?

Accepted Answer

A) a 
B) b 
C) c 
D) d 
E) All of the structures are complex viruses. 
A) a 
B) b 
C) c 
D) d 
E) All of the structures are complex viruses.

Question 16

Researchers studying tissues of diseased marine mammals have identified what appear to be viral particles by electron microscopy.Describe three methods you might use to attempt to culture this virus for further study.

Accepted Answer

1. Cell culture: One method to attempt t

Question 17

Dogs do not get measles because their cells lack the correct receptor sites for that virus.

Accepted Answer

A) True 
 B)False

Question 18

DNA made from an RNA template will be incorporated into the virus capsid of

Accepted Answer

A) Retroviridae. 
B) Herpesviridae. 
C) Hepadnaviridae. 
D) bacteriophage families. 
E) influenzavirus. 
A) Retroviridae. 
B) Herpesviridae. 
C) Hepadnaviridae. 
D) bacteriophage families. 
E) influenzavirus.

Question 19

Which of the following is most likely a product of an early gene?

Accepted Answer

A) capsid proteins 
B) DNA polymerase 
C) envelope proteins 
D) spike proteins 
E) lysozyme 
A) capsid proteins 
B) DNA polymerase 
C) envelope proteins 
D) spike proteins 
E) lysozyme

Question 20

Explain the steps involved in bacteriophage DNA entering a bacterial cell.

Accepted Answer

Bacteriophage DNA entering a bacterial c

Exam 13: Viruses,viroids,and Prions

A viroid is a(n)

Which of the following is NOT utilized to culture viruses?

Figure 13.1 -The morphological types of viruses illustrated in Figure 13.1 are ultimately determined by the

Bacteriophages and animal viruses do NOT differ significantly in which one of the following steps?

How do all viruses differ from bacteria?

Assume you have isolated an unknown virus.This virus has a single,positive sense strand of RNA,and possesses an envelope.To which group does it most likely belong?

A viroid is a completely developed infectious agent composed of nucleic acid and surrounded by a capsid.

What is NOT true regarding viruses that infect plants?

Why do most scientists agree that viruses are nonliving entities?

Which of the following statements about viruses is FALSE?

Glycoprotein spikes are found on the capsids of all viruses.

Most RNA viruses carry which of the following enzymes?

An example of a latent viral infection is

What is the key characteristic of a transformed cell?

Figure 13.1 -In Figure 13.1,which structure is a complex virus?

Researchers studying tissues of diseased marine mammals have identified what appear to be viral particles by electron microscopy.Describe three methods you might use to attempt to culture this virus for further study.

Dogs do not get measles because their cells lack the correct receptor sites for that virus.

DNA made from an RNA template will be incorporated into the virus capsid of

Which of the following is most likely a product of an early gene?

Explain the steps involved in bacteriophage DNA entering a bacterial cell.

The Microbial World and You

Chemical Principles

Observing Microorganisms Through a Microscope

Functional Anatomy of Prokaryotic and Eukaryotic

Microbial Metabolism

Microbial Growth

The Control of Microbial Growth

Microbial Genetics

Biotechnology and Dna Technology

Classification of Microorganisms

The Prokaryotes: Domains Bacteria and Archaea

The Eukaryotes: Fungi, algae, protozoa, and Helminths

Principles of Disease and Epidemiology

Microbial Mechanisms of Pathogenicity

Innate Immunity: Nonspecific Defenses of the Host

Adaptive Immunity: Specific Defenses of the Host

Practical Applications of Immunology

Disorders Associated With the Immune System

Antimicrobial Drugs

Microbial Diseases of the Skin and Eyes

Microbial Diseases of the Nervous System

Microbial Diseases of the Cardiovascular and Lymphatic Systems

Microbial Diseases of the Respiratory System

Microbial Diseases of the Digestive System

Microbial Diseases of the Urinary and Reproductive Systems

Environmental Microbiology

Applied and Industrial Microbiology

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