What Are Viruses? - Definition, Structure & Function


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question 1 of 3

A virus that infects a bacteria is known as a(n):

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1. Which of the following is the best definition of a virion?

2. Which of the following are present in ALL virions?

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About This Quiz & Worksheet

Viruses are microscopic infectious agents that reproduce by invading cells in a living host. You can assess yourself on your understanding of the characteristics of viruses with this online quiz. Some things you'll be assessed on include the subunits of a viral capsid and a virus that infects bacteria.

Quiz & Worksheet Goals

These assesment tools will help you examine the following topics:

  • Organic molecules that make up the viral nucleic acid genome
  • An infective form of a virus existing outside of its host cell and what it consist of
  • Enveloped viruses
  • The minimum needs of a virus for survival

Skills Practiced

  • Information recall - test your recollection of the characteristics of viruses by answering the attached quiz questions
  • Knowledge application - apply the information you've learned from the attached lesson to identify the components, types and forms of viruses
  • Interpreting information - make sure that you can accurately interpret what viruses need to survive and determine if it can take over a host

Additional Learning

For further understanding of virus, check out the lesson called What are Viruses? - Definition, Structure & Function. This lesson covers the following topics:

  • Overview of viruses
  • The study of virology
  • How viruses function
  • The impact of viruses