True/False
Indicate whether the sentence or statement is true
or false.
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1.
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Although viruses do not consist of cells, biologists consider them to be living
because they are capable of reproduction.
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2.
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Wendell Stanley made the important discovery that viruses are not
cellular.
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3.
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Viruses consist of RNA or DNA surrounded by a coat of protein.
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4.
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Prions are the smallest known particles that are able to replicate.
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5.
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A
virus can only reproduce by controlling a cell.
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6.
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People can contract the influenza virus more than once because the virus tends to
mutate rapidly, avoiding the actions of the immune system.
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7.
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Smallpox is caused by bacteria.
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8.
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Chickenpox and shingles are caused by the same virus.
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9.
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The
viruses that have been linked to human cancers are usually transmitted through the air.
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Completion
Complete each sentence or
statement.
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10.
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The
protein coat of a virus is called a(n) ____________________.
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11.
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Most
viruses occur in the shape of a(n) ____________________ or a(n) ____________________.
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12.
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A
virus that transcribes DNA from an RNA template is called a(n) ____________________.
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13.
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An
enzyme called ____________________ manufactures DNA that is complementary to a virus’s
RNA.
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14.
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____________________ are bacterial viruses with a polyhedral head and a helical
tail.
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15.
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All
viruses reproduce by taking over the reproductive machinery of a ____________________.
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16.
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Viruses that infect a host cell and have their nucleic acid replicated but do not harm
the host cell are in a ____________________ cycle.
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17.
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A
viral DNA molecule formed from an RNA virus is called a(n) ____________________.
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18.
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The
virus that causes AIDS is called ____________________.
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19.
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Some
viruses are thought to induce ____________________, a disease characterized by uncontrolled cell
division.
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20.
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An
example of an emerging virus is the ____________________ virus.
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