Question 1

T-even phages ______.

Accepted Answer

A)  include the poxviruses 
B)  infect Escherichia coli cells 
C)  enter host cells by engulfment 
D)  have helical capsids 
A)  include the poxviruses 
B)  infect Escherichia coli cells 
C)  enter host cells by engulfment 
D)  have helical capsids B

Question 2

Creutzfeldt-Jacob disease is

Accepted Answer

A)  caused by a chronic latent virus. 
B)  initiated by an oncogenic virus. 
C)  caused by a viroid. 
D)  a spongiform encephalopathy of humans. 
E)  also called "mad cow disease." 
A)  caused by a chronic latent virus. 
B)  initiated by an oncogenic virus. 
C)  caused by a viroid. 
D)  a spongiform encephalopathy of humans. 
E)  also called "mad cow disease." D

Question 3

Who developed a rabies vaccine after realizing the disease was caused by something smaller than a bacterium?

Accepted Answer

A)  Leeuwenhoek 
B)  Koch 
C)  Pasteur 
D)  Cohn 
E)  Ivanovski 
A)  Leeuwenhoek 
B)  Koch 
C)  Pasteur 
D)  Cohn 
E)  Ivanovski C

Question 4

In transduction,the viral genome

Accepted Answer

A)  initiates lysis of the host. 
B)  includes DNA from the previous host. 
C)  is replicated in the cytoplasm. 
D)  is replicated in the nucleus. 
A)  initiates lysis of the host. 
B)  includes DNA from the previous host. 
C)  is replicated in the cytoplasm. 
D)  is replicated in the nucleus.

Question 5

What type of phage enters an inactive prophage stage?

Accepted Answer

A)  Primary 
B)  Secondary 
C)  Temperate 
D)  Temporary 
E)  Transformed 
A)  Primary 
B)  Secondary 
C)  Temperate 
D)  Temporary 
E)  Transformed

Question 6

Viruses are unable to multiply outside of a host cell.

Accepted Answer

A) True 
 B)False

Question 7

Which of the following occurs during assembly?

Accepted Answer

A)  The nucleocapsid is formed. 
B)  New viral nucleic acid is formed. 
C)  Viral spikes insert in host cell membrane. 
D)  The nucleocapsid is formed and viral spikes insert in host cell membrane. 
E)  The viral envelope and the host cell membrane fuse. 
A)  The nucleocapsid is formed. 
B)  New viral nucleic acid is formed. 
C)  Viral spikes insert in host cell membrane. 
D)  The nucleocapsid is formed and viral spikes insert in host cell membrane. 
E)  The viral envelope and the host cell membrane fuse.

Question 8

Viruses mutate,and some viruses have not been discovered.

Accepted Answer

A) True 
 B)False

Question 9

Compared to bacteria that have a typical size range between 1-10 $\mu$m,

Accepted Answer

A)  viruses range in size between 20-200 nm and are much larger than bacterial cells. 
B)  viruses have a much greater size range; between 22 nm and 1000 nm. 
C)  all viruses are 22 nm. 
D)  viruses are larger and are blocked by sterilizing filters. 
A)  viruses range in size between 20-200 nm and are much larger than bacterial cells. 
B)  viruses have a much greater size range; between 22 nm and 1000 nm. 
C)  all viruses are 22 nm. 
D)  viruses are larger and are blocked by sterilizing filters.

Question 10

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

Accepted Answer

A)  glycoproteins 
B)  antibodies 
C)  complement proteins 
D)  antigens 
A)  glycoproteins 
B)  antibodies 
C)  complement proteins 
D)  antigens

Question 11

The process of dissolving the envelope and capsid to release the viral nucleic acid is ______.

Accepted Answer

A)  adsorption 
B)  penetration 
C)  uncoating 
D)  synthesis 
E)  assembly 
A)  adsorption 
B)  penetration 
C)  uncoating 
D)  synthesis 
E)  assembly

Question 12

The correct sequence of events in viral multiplication is

Accepted Answer

A)  penetration, uncoating, synthesis, adsorption, assembly, and release. 
B)  uncoating, penetration, synthesis, assembly, absorption, and release. 
C)  adsorption, penetration, uncoating, synthesis, assembly, and release. 
D)  assembly, synthesis, uncoating, release, penetration, and adsorption. 
E)  adsorption, release, synthesis, uncoating, assembly, and penetration. 
A)  penetration, uncoating, synthesis, adsorption, assembly, and release. 
B)  uncoating, penetration, synthesis, assembly, absorption, and release. 
C)  adsorption, penetration, uncoating, synthesis, assembly, and release. 
D)  assembly, synthesis, uncoating, release, penetration, and adsorption. 
E)  adsorption, release, synthesis, uncoating, assembly, and penetration.

Question 13

The envelope of enveloped viruses

Accepted Answer

A)  is identical to the host plasma membrane. 
B)  is only composed of host endomembrane. 
C)  does not contain spikes. 
D)  is obtained by viral budding or exocytosis. 
E)  makes the virus very susceptible to drug therapy. 
A)  is identical to the host plasma membrane. 
B)  is only composed of host endomembrane. 
C)  does not contain spikes. 
D)  is obtained by viral budding or exocytosis. 
E)  makes the virus very susceptible to drug therapy.

Question 14

Sterilizing filters have a pore size of 0.22 $\mu$m.Which of the following statements is true?

Accepted Answer

A)  Bacterial cells are typically between 1,000-10,000 nm and pass through the filter, whereas most viruses are between 20 and 200 nm and are therefore blocked. 
B)  Bacterial cells are typically between 1-10 $\mu$m and pass through the filter, whereas most viruses are between 20 and 200 nm and are therefore blocked. 
C)  Bacterial cells are typically between 1-10 $\mu$m and are blocked by the filter, whereas most viruses are between 20 and 200 nm and therefore pass through. 
D)  Bacterial cells are typically between 1-10 nm and are blocked by the filter, whereas most viruses are between 20 and 200 $\mu$m and therefore pass through. 
A)  Bacterial cells are typically between 1,000-10,000 nm and pass through the filter, whereas most viruses are between 20 and 200 nm and are therefore blocked. 
B)  Bacterial cells are typically between 1-10 $\mu$m and pass through the filter, whereas most viruses are between 20 and 200 nm and are therefore blocked. 
C)  Bacterial cells are typically between 1-10 $\mu$m and are blocked by the filter, whereas most viruses are between 20 and 200 nm and therefore pass through. 
D)  Bacterial cells are typically between 1-10 nm and are blocked by the filter, whereas most viruses are between 20 and 200 $\mu$m and therefore pass through.

Question 15

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)  All of the choices will support viral cultivation. 
A)  Live lab animals 
B)  Embryonated bird eggs 
C)  Primary cell cultures 
D)  Continuous cell cultures 
E)  All of the choices will support viral cultivation.

Question 16

Which of the following 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 cells 
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 cells

Question 17

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

Accepted Answer

A) True 
 B)False

Question 18

Visible,clear,well-defined patches in a monolayer of virus-infected cells in a culture are called ______.

Accepted Answer

A)  patches 
B)  buds 
C)  plaques 
D)  cytopathic effects 
E)  pocks 
A)  patches 
B)  buds 
C)  plaques 
D)  cytopathic effects 
E)  pocks

Question 19

Which of the following is not a typical capsid shape?

Accepted Answer

A)  Tetrahedral 
B)  Complex 
C)  Helical 
D)  Icosahedron 
A)  Tetrahedral 
B)  Complex 
C)  Helical 
D)  Icosahedron

Question 20

Satellite viruses are

Accepted Answer

A)  also called viroids. 
B)  dependent on other viruses for replication. 
C)  the cause of spongiform encephalopathies. 
D)  significant pathogens of plants. 
A)  also called viroids. 
B)  dependent on other viruses for replication. 
C)  the cause of spongiform encephalopathies. 
D)  significant pathogens of plants.

Exam 6: An Introduction to the Viruses

T-even phages ______.

Creutzfeldt-Jacob disease is

Who developed a rabies vaccine after realizing the disease was caused by something smaller than a bacterium?

In transduction,the viral genome

What type of phage enters an inactive prophage stage?

Viruses are unable to multiply outside of a host cell.

Which of the following occurs during assembly?

Viruses mutate,and some viruses have not been discovered.

Compared to bacteria that have a typical size range between 1-10 μ\muμ m,

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

The process of dissolving the envelope and capsid to release the viral nucleic acid is ______.

The correct sequence of events in viral multiplication is

The envelope of enveloped viruses

Sterilizing filters have a pore size of 0.22 μ\muμ m.Which of the following statements is true?

Which of the following will not support viral cultivation?

Which of the following is incorrect about prophages?

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

Visible,clear,well-defined patches in a monolayer of virus-infected cells in a culture are called ______.

Which of the following is not a typical capsid shape?

Satellite viruses are

The Main Themes of Microbiology

The Chemistry of Biology

Tools of the Laboratory: Methods for the Culturing of Microscopic Analysis of Microorganisms

Bacteria and Archaea

Eukaryotic Cells and Microorganisms

Host Defenses II: Specific Immunity and Immunization

Microbial Metabolism: The Chemical Crossroads of Life

Microbial Genetics

Genetic Engineering and Recombinant Dna

Physical and Chemical Control of Microbes

Antimicrobial Treatment

Microbe-Human Interactions: Health and Disease

Host Defenses I: Overview and Nonspecific Defenses

Host Defenses II: Specific Immunity and Immunization

Disorders in Immunity

Diagnosing Infections

Infectious Diseases Affecting the Skin and Eyes

Infectious Diseases Affecting the Nervous System

Infectious Diseases Affecting the Cardiovascular and Lymphatic Systems

Infectious Diseases Affecting the Respiratory System

Infectious Diseases Affecting the Gastrointestinal Tract

Infectious Diseases Affecting the Genitourinary System

Microbes and the Environment

Applied Microbiology and Food and Water Safety

Filters

Compared to bacteria that have a typical size range between 1-10 $\mu$ m,

Sterilizing filters have a pore size of 0.22 $\mu$ m.Which of the following statements is true?