Question 1

Which of the following is NOT a method of culturing viruses?

Accepted Answer

A) In laboratory animals. 
B) In cell culture. 
C) In embryonated eggs. 
D) On an agar plate. 
E) All of the above can be used to culture viruses. 
A) In laboratory animals. 
B) In cell culture. 
C) In embryonated eggs. 
D) On an agar plate. 
E) All of the above can be used to culture viruses. D

Question 2

Viruses which can cause transformation of normal cells into tumour cells are called

Accepted Answer

A) persistent. 
B) latent. 
C) pathogenic. 
D) oncogenic. 
E) mutant. 
A) persistent. 
B) latent. 
C) pathogenic. 
D) oncogenic. 
E) mutant. D

Question 3

The name virus literally means

Accepted Answer

A) alive. 
B) poison. 
C) infectious. 
D) microscopic. 
E) non-living. 
A) alive. 
B) poison. 
C) infectious. 
D) microscopic. 
E) non-living. B

Question 4

Place the steps of viral multiplication in an animal cell into the correct order.
[key: 1 = release,2 = maturation,3 = adsorption,4 = uncoating,5 = penetration,6 = biosynthesis]

Accepted Answer

A) 1,2,3,4,5,6 
B) 6,5,4,3,2,1 
C) 6,4,2,3,1,5 
D) 3,5,4,6,2,1 
E) 3,4,5,6,1,2 
A) 1,2,3,4,5,6 
B) 6,5,4,3,2,1 
C) 6,4,2,3,1,5 
D) 3,5,4,6,2,1 
E) 3,4,5,6,1,2

Question 5

Which of the following has been associated with a form of human liver cancer?

Accepted Answer

A) Human papilloma virus. 
B) Hepatitis B virus. 
C) Herpes zoster virus. 
D) Hepatitis A virus. 
E) Human immunodeficiency virus. 
A) Human papilloma virus. 
B) Hepatitis B virus. 
C) Herpes zoster virus. 
D) Hepatitis A virus. 
E) Human immunodeficiency virus.

Question 6

During viral infection in human cells the

Accepted Answer

A) virus attaches to the host cell and injects its nucleic acid into the cell. 
B) protein capsid of the virus is digested by lysozyme. 
C) viral nucleic acid is copied by the host cell DNA. 
D) viral DNA directs the host cell DNA to synthesise viral components. 
E) host cell is not damaged when the new viral particles are released. 
A) virus attaches to the host cell and injects its nucleic acid into the cell. 
B) protein capsid of the virus is digested by lysozyme. 
C) viral nucleic acid is copied by the host cell DNA. 
D) viral DNA directs the host cell DNA to synthesise viral components. 
E) host cell is not damaged when the new viral particles are released.

Question 7

Which of the following bacteria contain a phage which is responsible for its virulence?

Accepted Answer

A) Corynebacterium diphtheria. 
B) Bordetella pertussis. 
C) Clostridium tetani. 
D) Mycobacterium tuberculosis. 
E) None of the above because bacteria don't need a phage for virulence. 
A) Corynebacterium diphtheria. 
B) Bordetella pertussis. 
C) Clostridium tetani. 
D) Mycobacterium tuberculosis. 
E) None of the above because bacteria don't need a phage for virulence.

Question 8

Which of the following is TRUE?

Accepted Answer

A) Viruses that infect humans never infect other animals. 
B) All viruses can only attack one type of cell. 
C) Each virus attaches to a specific receptor site on its target cells. 
D) Viruses that infect birds do not infect humans. 
E) All of the above. 
A) Viruses that infect humans never infect other animals. 
B) All viruses can only attack one type of cell. 
C) Each virus attaches to a specific receptor site on its target cells. 
D) Viruses that infect birds do not infect humans. 
E) All of the above.

Question 9

Some viruses are associated with the development of cancer.An important characteristic of cancer cells is

Accepted Answer

A) the lack of contact inhibition. 
B) the inability to synthesise protein. 
C) the slow metabolism. 
D) no nuclear membrane. 
E) the lack of staining properties. 
A) the lack of contact inhibition. 
B) the inability to synthesise protein. 
C) the slow metabolism. 
D) no nuclear membrane. 
E) the lack of staining properties.

Question 10

Which of the following is TRUE about viruses?

Accepted Answer

A) They are composed of cells. 
B) They metabolise nutrients. 
C) They reproduce outside a living cell. 
D) They have RNA or DNA. 
E) All of the above. 
A) They are composed of cells. 
B) They metabolise nutrients. 
C) They reproduce outside a living cell. 
D) They have RNA or DNA. 
E) All of the above.

Question 11

Which of the following statements about retroviruses is TRUE?

Accepted Answer

A) They usually synthesise DNA from viral RNA. 
B) They all contain an enzyme called reverse transcriptase. 
C) Their replication can be inhibited with nucleotide analogues. 
D) The human immunodeficiency virus is a retrovirus. 
E) All of the above. 
A) They usually synthesise DNA from viral RNA. 
B) They all contain an enzyme called reverse transcriptase. 
C) Their replication can be inhibited with nucleotide analogues. 
D) The human immunodeficiency virus is a retrovirus. 
E) All of the above.

Question 12

Viral nucleic acid

Accepted Answer

A) carries all the information necessary for the replication of new viral particles. 
B) codes only for some viral structural proteins and enzymes. 
C) acts as a template for synthesis of host cell mRNA. 
D) codes for the host cell enzymes required for viral synthesis. 
E) codes for the synthesis of interferon. 
A) carries all the information necessary for the replication of new viral particles. 
B) codes only for some viral structural proteins and enzymes. 
C) acts as a template for synthesis of host cell mRNA. 
D) codes for the host cell enzymes required for viral synthesis. 
E) codes for the synthesis of interferon.

Question 13

Which of the following is NOT a description of a type of viral infection?

Accepted Answer

A) Latent. 
B) Passive. 
C) Acute. 
D) Oncogenic. 
E) Subclinical. 
A) Latent. 
B) Passive. 
C) Acute. 
D) Oncogenic. 
E) Subclinical.

Question 14

Hepatitis B virus can cause a carrier state in a person,which means that

Accepted Answer

A) there is a continuous,low level of virus replication. 
B) the person is infected but doesn't transmit the virus. 
C) the infection will only ever be mild. 
D) the person's immune system is permanently damaged. 
E) all of the above. 
A) there is a continuous,low level of virus replication. 
B) the person is infected but doesn't transmit the virus. 
C) the infection will only ever be mild. 
D) the person's immune system is permanently damaged. 
E) all of the above.

Question 15

A virus that exhibits tissue tropism

Accepted Answer

A) infects one or a limited number of tissue types. 
B) attaches to numerous cell types,but only infects one type. 
C) is always able to cross the species barrier. 
D) is resistant to host defence mechanisms in that tissue. 
E) always causes life-threatening infections. 
A) infects one or a limited number of tissue types. 
B) attaches to numerous cell types,but only infects one type. 
C) is always able to cross the species barrier. 
D) is resistant to host defence mechanisms in that tissue. 
E) always causes life-threatening infections.

Question 16

To see the structure of viruses,it is necessary to use

Accepted Answer

A) a light microscope. 
B) a phase contrast microscope. 
C) an inverted microscope. 
D) an electron microscope. 
E) viruses are too small to be seen. 
A) a light microscope. 
B) a phase contrast microscope. 
C) an inverted microscope. 
D) an electron microscope. 
E) viruses are too small to be seen.

Question 17

In a chronic viral infection

Accepted Answer

A) viruses aren't shed from the body. 
B) the person is usually non-contagious. 
C) symptoms may be non-existent or mild. 
D) the body doesn't produce antibodies against the virus. 
E) all of the above. 
A) viruses aren't shed from the body. 
B) the person is usually non-contagious. 
C) symptoms may be non-existent or mild. 
D) the body doesn't produce antibodies against the virus. 
E) all of the above.

Question 18

Which of the following viruses is associated with cervical cancer?

Accepted Answer

A) Hepatitis A virus. 
B) Hepatitis B virus. 
C) Hepatitis C virus. 
D) Human immunodeficiency virus. 
E) Human papilloma virus. 
A) Hepatitis A virus. 
B) Hepatitis B virus. 
C) Hepatitis C virus. 
D) Human immunodeficiency virus. 
E) Human papilloma virus.

Question 19

Oncogenic viruses are ones which

Accepted Answer

A) can cause cancer. 
B) transform cells. 
C) integrate their DNA into the host cell genome. 
D) suppress contact inhibition in infected cells. 
E) all of the above. 
A) can cause cancer. 
B) transform cells. 
C) integrate their DNA into the host cell genome. 
D) suppress contact inhibition in infected cells. 
E) all of the above.

Question 20

Viruses that do not have an envelope are called

Accepted Answer

A) virions. 
B) particles. 
C) naked. 
D) viroids. 
E) prions. 
A) virions. 
B) particles. 
C) naked. 
D) viroids. 
E) prions.

Exam 5: Viruses and Viral Diseases

Which of the following is NOT a method of culturing viruses?

Viruses which can cause transformation of normal cells into tumour cells are called

The name virus literally means

Place the steps of viral multiplication in an animal cell into the correct order. [key: 1 = release,2 = maturation,3 = adsorption,4 = uncoating,5 = penetration,6 = biosynthesis]

Which of the following has been associated with a form of human liver cancer?

During viral infection in human cells the

Which of the following bacteria contain a phage which is responsible for its virulence?

Which of the following is TRUE?

Some viruses are associated with the development of cancer.An important characteristic of cancer cells is

Which of the following is TRUE about viruses?

Which of the following statements about retroviruses is TRUE?

Viral nucleic acid

Which of the following is NOT a description of a type of viral infection?

Hepatitis B virus can cause a carrier state in a person,which means that

A virus that exhibits tissue tropism

To see the structure of viruses,it is necessary to use

In a chronic viral infection

Which of the following viruses is associated with cervical cancer?

Oncogenic viruses are ones which

Viruses that do not have an envelope are called

The Invisible World

Biological Reactions in Microbial Cells

Bacteria

Genes and Biotechnology

Eucaryotic Microorganisms: Fungi, protozoa and Multicellular Organisms

Hostmicrobe Interactions and Principles of Disease

Epidemiology: How Diseases Are Spread

The Bodys Defence Systems

Pathogenic Mechanisms and Evasion Strategies of Microorganisms

Principles of Sterilisation and Disinfection

Antimicrobial Therapy

Infection Control in Healthcare Facilities

Issues in Public Health

Microbial Techniques for Diagnosis of Infection

Skin, wound and Eye Infections

Respiratory Tract Infections

Gastrointestinal Tract Infections

Cardiovascular and Multisystem Infections

Infections of the Nervous System

Infections of the Urinary and Reproductive Systems

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