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Multiple Choice Quiz
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1

Viruses consist of a ________________ core surrounded by a protein coat.
A)RNA
B)DNA
C)chromosome
D)nucleic acid
2

Phages infect bacterial cells by
A)poking holes in the cell and injecting their DNA.
B)destroying the bacterial cell wall.
C)receptor-mediated endocytosis.
D)exocytosis.
3

The end result of the viral lytic cycle is
A)the release of new viruses.
B)the incorporation of viral genome into the host genome.
C)the conversion of the virus into a prophage.
D)Both b and c are correct.
4

The alteration of a cell's genome by the incorporation of foreign DNA is called
A)genetic conversion.
B)mutation.
C)transformation.
D)reverse transcription.
5

Which of the following is a viral glycoprotein that plays a role in the infection of human cells by HIV?
A)gp120
B)CD4
C)CCR5
D)Both b and c are correct.
6

The HIV enzyme, ________________, produces a DNA copy of the viral genome once it is inside the host cell.
A)DNA polymerase
B)reverse transcriptase
C)RNA polymerase
D)helicase
7

The drug AZT and its analogs functions by
A)inhibiting the replication of viral nucleic acid.
B)blocking the production of envelope proteins.
C)blocking the production of capsid proteins.
D)blocking the binding of the virus to human cell receptors.
8

What is the function of the CD8+ cell antiviral factor (CAF) in human white blood cells?
A)disables the CD4 receptor
B)blocks replication of the HIV virus
C)interferes with the production of viral proteins
D)blocks the CCR5 or CXCR4 receptors
9

New strains of flu viruses are most likely to arise in the Far East because
A)of overpopulation in these areas.
B)adequate sanitation is lacking.
C)common hosts (ducks, chickens, pigs) live in close proximity to humans.
D)of environmental mutagens that cause changes in viral RNA.
10

Which of the following infectious agents does not contain protein?
A)viruses
B)viroids
C)prions
D)none of these







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