E-PolyLearning

1. Animal viruses with capsids displaying helical symmetry include
a. measles and mumps
b. influenza
c. rabies
d. all of these
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Answer: (d).all of these

2. Icosahedral viruses are generally
a. polio viruses
b. adeno viruses
c. both (a) and (b)
d. none of these
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Answer: (c).both (a) and (b)

3. Negative strand ssRNA viruses need to have a preformed replicase when they invade a mammalian cell because they
a. use it to terminate transcripts when they copy host cell mRNA
b. have to make a positive strand copy that can be translated
c. use it to modify host enzymes that are recruited for viral replication
d. none of the above
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Answer: (b).have to make a positive strand copy that can be translated

4. Which of the following reflects the correct order of events that take place during the multiplication of a virus?
a. Attachment, penetration, maturation, biosynthesis, release
b. Penetration, attachment, biosynthesis, maturation, release
c. Attachment, penetration, biosynthesis, maturation, release
d. Attachment, release, biosynthesis, maturation, penetration
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Answer: (c).Attachment, penetration, biosynthesis, maturation, release

5. What can be coated to the plastic dish if an ELISA is performed to directly detect polio virus?
a. Patient serum
b. Anti-polio antibody
c. Polio capsid protein
d. Colored substrate
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Answer: (b).Anti-polio antibody

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