Scelta multipla
Which of the following is a basic characteristic of a virus?
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18. Viruses, Viroids, & Prions
Introduction to Viruses
Scelta multipla
Which of the following is a basic characteristic of viruses?
A
They reproduce by binary fission independently of a host cell.
B
They are obligate intracellular parasites that require a host cell to replicate.
C
They have a cell wall composed of peptidoglycan.
D
They contain both DNA and RNA in the same virion as a rule.
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Understand that viruses are unique infectious agents that differ fundamentally from cellular organisms such as bacteria and fungi.
Recall that viruses cannot carry out metabolic processes or reproduce independently; instead, they must infect a host cell to replicate.
Recognize that binary fission is a method of asexual reproduction used by bacteria, not viruses, so viruses do not reproduce by binary fission.
Note that viruses do not have a cell wall, and specifically, they do not have peptidoglycan, which is characteristic of bacterial cell walls.
Understand that viruses typically contain either DNA or RNA as their genetic material, but not both simultaneously within the same virion.
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