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Virology Final Exam Questions with Correct Answer3
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Virology Final Exam Questions with Correct Answer3
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Virology Final Exam Questions with Correct AnswersWhich of the following statements about viruses are false:
A) A virus must be inside a cell in order to replicate
B) the virus uses the cell machinery to make new parts
C) The virion or virus particle is used to transmit the virus from cell to
cell
D) During replication, 1 virion divides to make 2 virions, leading to
exponential growth
E) All of the above statements are true Correct Answer-D) During
replication, 1 virion divides to make 2 virions, leading to exponential
growth
A new virus have been isolated that causes severe respiratory distress
and has been associated with a high rate of mortality. As a researcher
which virus characteristic would provide you with the greatest amount
of information about the virus and create a framework to guide your
investigation
A) Morphology or shape
B) Host range
C) Function of non-structural proteins
D) sequence and identity of the genome
E) symptoms of illness caused by infection Correct Answer-D) sequence
and identity of the genome
which of the following about evolution is FALSE
A) All viruses evolve at the same rate
,B) virus evolution requires genetic variation
C) viruses with segmented genomes evolve as a result of segment
reassortment
D) Viruses accumulate mutations during genome replication
E) Both DNA and RNA viruses can evolve as a result of recombination
Correct Answer-A) All viruses evolve at the same rate
Mutagens like ribavirin increase the rate of mutation and have been
studied for their potential to serve as antivirals. Which of the following
best describes the mechanism for the antiviral activity of mutagens
A) Mutagens can directly inactivate viral polymerases by binding to the
active site
B) Mutagens can push a virus population past the error threshold by
increasing the normal rate of mutation
C) Mutagens can shift the error threshold by increasing the fidelity of
the viral polymerase
D) Mutagens can prevent error catastrophe by increasing the normal rate
of mutation Correct Answer-B) Mutagens can push a virus population
past the error threshold by increasing the normal rate of mutation
An emerging virus could be characterized by all the following EXCEPT:
A) Cross-species infection becomes established in a new population
B) the causative agent was previously unrecognized
C) an expanded host range caused an increase in disease
D) the virus was transmitted from a wild or domesticated animal
, E) none of the above. All of these could characterize an emerging virus.
Correct Answer-E) none of the above. All of these could characterize an
emerging virus.
Which of the following is the best example of the relationship between
viral evolution and emerging viral infection
A) host range can be expanded by mutation
B) Improved sanitation prevents spread of viruses transmitted by the
fecal-oral route
C) population densities that promote close personal contact encourage
the spread of emerging viral infections
D) Increase in travel and transport are correlated with emerging viral
infections
E) Deforestation promotes change in virus ecology Correct Answer-A)
host range can be expanded by mutation
A newly identified virus inactivated in the laboratory after just minutes
of sitting at room temperature. Based n this information, what is the
most likely for of transission
A) Fecal-oral transmission
B) Respiratory transmission
C) conjunctival transmission
D) sexual transmission Correct Answer-D) sexual transmission
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