Chapter 13 – Viruses, Viroids, and Prions

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Chapter 13 Viruses, Viroids, and Prions
The Spread and Patterns of Disease
Viral Characteristics
Viral Infections
Prions/Viroids
Epidemiology
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FINAL ROUND
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Topic 1 Viral Characteristics100 Question

• Viruses differ from bacteria in that
• a. Viruses do not have any nucleic acid
• b. Viruses do not reproduce
• c. Viruses are filterable
• d. Viruses are not composed of cells

ANSWER
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Topic 1 Viral Characteristics 100 Answer

• Viruses differ from bacteria in that
• a. Viruses do not have any nucleic acid
• b. Viruses are obligate intracellular parasites
• c. Viruses are filterable
• d. Viruses are not composed of cells (correct
  answer)

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Topic 1 Viral Characteristics 200 Question

• An example of a complex viral structure is?
• a. A viroid
• b. A bacteriophage
• c. The herpes virus
• d. A togavirus

ANSWER
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Topic 1 Viral Characteristics 200 Answer

• An example of a complex viral structure is?
• a. A viroid
• b. A bacteriophage(correct answer)
• c. The herpes virus
• d. A togavirus

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Topic 1 Viral Characteristics 300 Question

• Viruses that infect bacteria are called
• a. Bacteriophages
• b. Prions
• c. Viroids
• d. Complex viruses

ANSWER
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Topic 1 Viral Characteristics 300 Answer

• Viruses that infect bacteria are called
• a. Bacteriophages (correct answer)
• b. Prions
• c. Viroids
• d. Complex viruses

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Topic 1 Viral Characteristics 400 Question

• Viruses range in size from
• a. 10 to 100 nm in length
• b. 10 to 1000 nm in length
• c. 20 to 100 nm in length
• d. 20 to 1000 nm in length

ANSWER
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Topic 1 Viral Characteristics 400 Answer

• Viruses range in size from
• a. 10 to 100 nm in length
• b. 10 to 1000 nm in length
• c. 20 to 100 nm in length
• d. 20 to 1000 nm in length (correct answer)

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Topic 1 Viral Characteristics 500 Question

• Which of the following is NOT used as a criterion
  to classify viruses?
• a. Biochemical tests
• b. Size
• c. Morphology
• d. Number of capsomeres

ANSWER
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Topic 1 Viral Characteristics 500 Answer

• Which of the following is NOT used as a criterion
  to classify viruses?
• a. Biochemical tests (correct answer)
• b. Size
• c. Morphology
• d. Number of capsomeres

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Topic 2 Viral Infections100 Question

• A persistent infection is an infection in which?
• a. The disease process occurs gradually over a
  long period
• b. Host cells are gradually lysed
• c. Viral replication is usually slow
• d. Host cells are transformed

ANSWER
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Topic 2 Viral Infections100 Answer

• A persistent infection is an infection in which?
• a. The disease process occurs gradually over a
  long period (correct answer)
• b. Host cells are gradually lysed
• c. Viral replication is usually slow
• d. Host cells are transformed

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Topic 2 Viral Infections 200 Question

• Viruses CANNOT be cultured
• a. In laboratory animals
• b. In cell culture
• c. In embryonated eggs
• d. In culture media

ANSWER
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Topic 2 Viral Infections 200 Answer

• Viruses CANNOT be cultured
• a. In laboratory animals
• b. In cell culture
• c. In embryonated eggs
• d. In culture media (correct answer)

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Topic 2 Viral Infections 300 Question

• A togavirus is
• a. A single-stranded RNA enveloped virus
• b. A single-stranded DNA nonenveloped virus
• c. A double-stranded DNA nonenveloped virus
• d. A single-stranded RNA nonenveloped virus

ANSWER
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Topic 2 Viral Infections 300 Answer

• A togavirus is
• a. A single-stranded RNA enveloped virus (correct
  answer)
• b. A single-stranded DNA nonenveloped virus
• c. A double-stranded DNA nonenveloped virus
• d. A single-stranded RNA nonenveloped virus

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Topic 2 Viral Infections 400 Question

• An example of a latent viral infection is
• a. Shingles
• b. Herpes Simplex I
• c. Mumps
• d. Both a b

ANSWER
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Topic 2 Viral Infections 400 Answer

• An example of a latent viral infection is
• a. Shingles
• b. Herpes Simplex I
• c. Mumps
• d. Both a b (correct answer)

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Topic 2 Viral Infections 500 Question

• An example of a persistent viral infection in
  humans is
• a. Cold sores
• b. Cervical cancer
• c. Shingles
• d. Leukemia

ANSWER
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Topic 2 Viral Infections 500 Answer

• An example of a persistent viral infection in
  humans is
• a. Cold sores
• b. Cervical cancer (correct answer)
• c. Shingles
• d. Leukemia

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Topic 3 Prions/Viroids100 Question

• An infectious protein is a
• a. Retrovirus
• b. Papovavirus
• c. Viroid
• d. Prion

ANSWER
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Topic 3 Prions/Viroids 100 Answer

• An infectious protein is a
• a. Retrovirus
• b. Papovavirus
• c. Viroid
• d. Prion (correct answer)

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Topic 3 Prions/Viroids 200 Question

• A viroid is
• a. A provirus
• b. A naked, infectious piece of RNA
• c. A capsid without a nucleic acid
• d. A complete, infectious virus particle

ANSWER
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Topic 3 Prions/Viroids 200 Answer

• A viroid is
• a. A provirus
• b. A naked, infectious piece of RNA (correct
  answer)
• c. A capsid without a nucleic acid
• d. A complete, infectious virus particle

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Topic 3 Prions/Viroids 300 Question

• Viroids infect
• a. Animals
• b. Insects
• c. Plants
• d. Bacteria

ANSWER
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Topic 3 Prions/Viroids 300 Answer

• Viroids infect
• a. Animals
• b. Insects
• c. Plants (correct answer)
• d. Bacteria

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Topic 3 Prions/Viroids 400 Question

• Scrapie is an example of an infection caused by
• a. A prion
• b. A viroid
• c. A difficult-to-detect virus
• d. A difficult-to-grow bacterium

ANSWER
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Topic 3 Prions/Viroids 400 Answer

• Scrapie is an example of an infection caused by
• a. A prion (correct answer)
• b. A viroid
• c. A difficult-to-detect virus
• d. A difficult-to-grow bacterium

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Topic 3 Prions/Viroids 500 Question

• One human disease caused by a prion is
• a. Mad cow disease
• b. Creutzfeldt-Jakob disease
• c. Scrapie
• d. Tularemia

ANSWER
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Topic 3 Prions/Viroids 500 Answer

• One human disease caused by a prion is
• a. Mad cow disease
• b. Creutzfeldt-Jakob disease (correct answer)
• c. Scrapie
• d. Tularemia

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Topic 4 The Spread and Patterns of Disease 100
Question

• Kochs postulates dont apply to all diseases
  because
• a. Some microorganisms cause different
  symptoms under different conditions
• b. Some microorganisms cannot be observed
• c. Not all diseases are caused by microorganisms
• d. Some microorganisms cant be cultured in
  laboratory media.

ANSWER
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Topic 4 The Spread and Patterns of Disease 100
Answer

• Kochs postulates dont apply to all diseases
  because
• a. Some microorganisms cause different
  symptoms under different conditions
• b. Some microorganisms cannot be observed
• c. Not all diseases are caused by microorganisms
  (correct answer)
• d. Some microorganisms cant be cultured in
  laboratory media.

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Topic 4 The Spread and Patterns of Disease 200
Question

• A clearing visible against a lawn of bacterial
  growth on the surface of agar is called a
• a. Phage
• b. Cell lysis
• c. Pock
• d. Plaque

ANSWER
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Topic 4 The Spread and Patterns of Disease 200
Answer

• A clearing visible against a lawn of bacterial
  growth on the surface of agar is called a
• a. Phage
• b. Cell lysis
• c. Pock
• d. Plaque (correct answer)

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Topic 4 The Spread and Patterns of Disease 300
Question

• A commensal bacterium
• a. Does not infect its host
• b. Is beneficial to its host
• c. May be an opportunistic pathogen
• d. Does not receive any benefit from its host

ANSWER
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Topic 4 The Spread and Patterns of Disease 300
Answer

• A commensal bacterium
• a. Does not infect its host
• b. Is beneficial to its host
• c. May be an opportunistic pathogen (correct
  answer)
• d. Does not receive any benefit from its host

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Topic 4 The Spread and Patterns of Disease 400
Question

• Which of the following is a fomite?
• a. Sneeze droplets
• b. A hypodermic needle
• c. Insects
• d. Water

ANSWER
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Topic 4 The Spread and Patterns of Disease r
400 Answer

• Which of the following is a fomite?
• a. Sneeze droplets
• b. A hypodermic needle (correct answer)
• c. Insects
• d. Water

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Topic 4 The Spread and Patterns of Disease 500
Question

• What is the most common type of nosocomial
  infection?
• a. Lower respiratory infections
• b. Postoperative infections
• c. Bacteremia
• d. Urinary tract infections

ANSWER
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Topic 4 The Spread and Patterns of Disease 500
Answer

• What is the most common type of nosocomial
  infection?
• a. Lower respiratory infections
• b. Postoperative infections
• c. Bacteremia
• d. Urinary tract infections (correct answer)

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42
Topic 5 Epidemiology 100 Question

• One effect of washing regularly with
  antibacterial agents is the removal of normal
  microbiota. This can result in
• a. Fewer diseases
• b. Body odor
• c. Normal microbiota returning immediately
• d. Increased susceptibility to disease

ANSWER
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Topic 5 Epidemiology 100 Answer

• One effect of washing regularly with
  antibacterial agents is the removal of normal
  microbiota. This can result in
• a. Fewer diseases
• b. Body odor
• c. Normal microbiota returning immediately
• d. Increased susceptibility to disease (correct
  answer)

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Topic 5 Epidemiology 200 Question

• The science that deals with when diseases occur
  how they are transmitted is called
• a. Public health
• b. Ecology
• c. Epidemiology
• d. Morbidity

ANSWER
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Topic 5 Epidemiology 200 Answer

• The science that deals with when diseases occur
  how they are transmitted is called
• a. Public health
• b. Ecology
• c. Epidemiology (correct answer)
• d. Morbidity

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Topic 5 Epidemiology 300 Question

• Emergence of infectious diseases can be due to
  all of the following EXCEPT
• a. climatic changes
• b. Travel
• c. Microbes trying to cause disease because they
  are evil
• d. Digging up soil

ANSWER
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Topic 5 Epidemiology 300 Answer

• Emergence of infectious diseases can be due to
  all of the following EXCEPT
• a. climatic changes
• b. Travel
• c. Microbes trying to cause disease because they
  are evil (correct answer)
• d. Digging up soil

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Topic 5 Epidemiology 400 Question

• Which of the following can contribute to
  postoperative infections?
• a. normal microbiota on the operating
  room staff
• b. Antibiotic resistance
• c. Errors in aseptic technique
• d. All of the above

ANSWER
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Topic 5 Epidemiology 400 Answer

• Which of the following can contribute to
  postoperative infections?
• a. normal microbiota on the operating
  room staff
• b. Antibiotic resistance
• c. Errors in aseptic technique
• d. All of the above (correct answer)

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Topic 5 Epidemiology 500 Question

• An epidemic caused by Yersinia pestis would be an
  example of
• a. Vector transmission
• b. Droplet transmission
• c. Fomite transmission
• d. Direct contact transmission

ANSWER
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Topic 5 Epidemiology 500 Answer

• An epidemic caused by Yersinia pestis would be an
  example of
• a. Vector transmission (correct answer)
• b. Droplet transmission
• c. Fomite transmission
• d. Direct contact transmission

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FINAL ROUND Question

• Which of the following is an avian influenza?
• a. H3N2
• b. H1N2
• c. H5N1
• d. H1N1

ANSWER
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FINAL ROUND Answer

• Which of the following is an avian influenza?
• a. H3N2
• b. H1N2
• c. H5N1(correct answer)
• d. H1N1

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