Multiple Choice
Which of the following is a characteristic of a virus, but not a bacterium?
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1. Introduction to Microbiology
Acellular Infectious Agents: Viruses, Viroids & Prions
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Which of the following best defines a viral species?
A
Is classified based solely on the shape of its capsid
B
Shares the same genetic information and ecological niche
C
Contains both DNA and RNA in its genome
D
Has identical protein coats and infects only animals
Verified step by step guidance1
Understand that defining a viral species differs from defining species in cellular organisms because viruses do not reproduce sexually and have unique genetic and ecological characteristics.
Recall that viral species are generally classified based on genetic similarity and ecological niche rather than just physical characteristics like capsid shape or genome type.
Evaluate each option by comparing it to the accepted definition of a viral species, which emphasizes shared genetic information and ecological niche.
Recognize that the correct definition involves viruses that share the same genetic information and occupy the same ecological niche, rather than just structural features or genome composition.
Conclude that the best definition of a viral species is the one stating that members share the same genetic information and ecological niche.
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