Scientists have long sought to uncover the structure and function of viruses.
Viruses are unique -- they have been classified as both living and nonliving at various points in the history of biology.
A virus particle, also known as a virion, is essentially a nucleic acid (DNA or RNA) enclosed in a protein shell or coat. A single virus particle is in and of itself essentially inert.
It lacks needed components that cells have to reproduce. Viruses cannot reproduce or express their genes without the help of a host.
Do you know what viruses that infect bacteria are called? Test your knowledge of viruses. To take the Virus Quiz, simply click on the "Start The Game" link below and select the correct answer for each question.
To learn more about viruses before taking the quiz, visit the Virus