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Problem 13.2a
Describe the five phases of a generalized lytic replication cycle.
Problem 13.3a
Why is it difficult to treat viral infections?
Problem 13.4a
Describe four different ways that viral nucleic acid can enter a host cell.
Problem 13.5a
Contrast lysis and budding as means of release of virions from a host cell.
Problem 13.6a
When a eukaryotic cell is infected with an enveloped virus and sheds viruses slowly over time, this infection ___________ .
a. is called a lytic infection
b. is a prophage cycle
c. is called a persistent infection
d. is caused by a quiescent virus
Problem 13.7a
How is a provirus like a prophage? How is it different?
Problem 13.8a
Describe lysogeny.
Problem 13.9a
How are viruses specific for their host’s cells?
Problem 25.1a
Why are humans considered “dead-end” hosts for many arboviruses?
Problem 25.11a
Reoviruses, such as rotaviruses and coltiviruses, are unique in ___________.
a. being naked
b. having double-stranded RNA
c. being both arboviruses and zoonotic
d. having protein spikes
Problem 25.11a
Compare influenzavirus A 2009 (H1N1) to the 1918–1919 pandemic influenzavirus.
Problem 25.4a
Which of the following viruses cause most colds?
a. rhinoviruses
b. parainfluenza viruses
c. pneumoviruses
d. bunyaviruses
Problem 25.4a
Why is AIDS more accurately termed a “syndrome” instead of a “disease”?
Problem 25.5a
Arboviruses are ___________.
a. zoonotic pathogens
b. deactivated viruses used in vaccines
c. viruses that are transmitted to humans via the bite of an arthropod
d. found in arbors
Problem 25.5a
_____A typical host for a togavirus is a horse.
Problem 25.5a
Consider the viruses you studied in this chapter. Which three would you rank as the deadliest?
Problem 25.6a
Negri bodies are associated with which of the following?
a. Marburg virus
b. hantavirus
c. coltivirus
d. rabies virus
Problem 25.7a
If mosquitoes were eradicated from an area, which of the following diseases would be most affected?
a. mumps
b. Hantavirus pulmonary syndrome
c. hepatitis E
d. breakbone fever
Problem 25.7a
Translate the following identification label on a vial of influenzavirus: B/Kuwait (H1N3).
Problem 25.8a
Polio and smallpox have been eliminated as natural threats to human health in the United States. (Some risk from bioterrorism remains.) You have considered the features of these diseases that allowed them to be eliminated. From your studies of other viruses, what other viral diseases are candidates for elimination? Why hasn’t AIDS been eliminated?
Problem 25.9a
Which of the following is an accurate statement concerning zoonoses?
a. They are animal diseases that spread to humans.
b. They are diseases specifically transmitted by mosquitoes and ticks.
c. They are mucus-borne viruses, which are transmitted in the droplets of moisture in a sneeze or cough.
d. They are diseases that can be transmitted from humans to an animal population.
Problem 25.9a
Several laboratory tests are used to identify viruses. From your study of this chapter alone, which tests would you surmise are the most common?
