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Viruses Answers

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1
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Which is included in a lysogenic cycle?

A
early lysis of the host cell
B
the production and assembly of viral particles
C
the appearance of viral infection symptoms
D
a period of genetic integration
2
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Which argument supports the idea that viruses are alive?

A
Viruses have a cell membrane.
B
Viruses contain unique genetic information.
C
Viruses replicate in a host.
D
Viruses do not produce proteins.
3

Which best describes viruses?

A
Viruses are nonliving infectious agents.
B
Viruses can replicate without a host cell.
C
Viruses can be killed by strong antibiotics.
D
Viruses are similar to bacterial cells.
4

Which best describes the lytic and lysogenic cycles?

A
Unlike the lytic cycle, the lysogenic cycle involves production of virus particles.
B
Unlike the lysogenic cycle, the lytic cycle involves destruction of the host.
C
Symptoms of infection appear in the lysogenic cycle but not in the lytic cycle.
D
For virulent viruses, the lysogenic cycle is the main way of replicating.
5

Which virus has a structure that includes an outer lipid bilayer that is studded with proteins?

A
papilloma virus
B
rabies virus
C
influenza virus
D
bacteriophage virus
7

Which is a basic characteristic of all living cells?

A
cell wall
B
protein coat
C
energy metabolism
D
antibiotic resistance
8

Which structure is present in bacteria but not in a virus?

A
nucleic acid
B
capsid
C
cell membrane
D
envelope
10

What usually happens to the host’s DNA during the lytic cycle?

A
It is destroyed.
B
It is integrated with the viral DNA.
C
It becomes a provirus.
D
It is deactivated.

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Viruses Answers — Biology - SC3209 IC