Multiple Choice
Which of the following is a characteristic of a virus?
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1. Introduction to Microbiology
Acellular Infectious Agents: Viruses, Viroids & Prions
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Which of the following is not associated with every virus?
A
Genetic material (DNA or RNA)
B
Ability to infect host cells
C
A protein capsid
D
A lipid envelope
Verified step by step guidance1
Step 1: Understand the basic structure of viruses. Every virus contains genetic material, which can be either DNA or RNA, and this is essential for its replication and function.
Step 2: Recognize that all viruses have a protein capsid, which is a protective shell that encases the genetic material. This capsid is a fundamental component of every virus.
Step 3: Know that viruses must have the ability to infect host cells because they rely on host cellular machinery to reproduce. This infectivity is a universal characteristic of viruses.
Step 4: Learn about the lipid envelope, which is a membrane-like layer derived from the host cell's membrane. While many viruses have this envelope, it is not present in all viruses.
Step 5: Conclude that the lipid envelope is not associated with every virus, making it the correct answer to the question.
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