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What is a Virus?

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Questions and Answers

What is the primary function of the viral proteins in a virus?

To replicate the viral DNA or RNA

To protect the genetic material from the host cell's enzymes

To break down the host cell's membrane

To help the virus attach to host cells and enter the host without detection (correct)

What is the term for the process of a virus manufacturing proteins and replicating itself inside a host cell?

Translation

Transcription

Replication (correct)

Infection

What is the outer protective shell of a virus composed of?

Protomers

Nucleic acids

Lipids and proteins

Capsomeres (correct)

What is the shape of viruses that have a spiraling structure and a hollow center?

Helical Signup and view all the answers

What is the scientific field that studies viruses?

Virology Signup and view all the answers

What is the primary component of a virus's genetic code?

Deoxyribonucleic acid (DNA) or ribonucleic acid (RNA) Signup and view all the answers

What is a characteristic unique to giant viruses compared to other viruses?

They are visible with a light microscope Signup and view all the answers

Why are viruses considered nonliving?

Because they can only replicate with a host cell Signup and view all the answers

What is the minimum size of a virus?

17 nanometers Signup and view all the answers

What is necessary for a virus to infect a host cell?

The virus must enter the host cell's membrane Signup and view all the answers

What was Dmitri Ivanovsky researching between 1887 and 1890?

The disease-causing destruction of plants Signup and view all the answers

What was the significance of the filtered substance collected by Ivanovsky and Beijerinck?

It was an infectious agent smaller than bacteria Signup and view all the answers

What is the primary difference between bacteria and viruses?

Bacteria are living organisms, while viruses are nonliving particles Signup and view all the answers

What is the approximate ratio of viruses to bacteria in the environment?

10 to 1 Signup and view all the answers

What is the purpose of bacteriophages?

To infect and replicate within bacteria Signup and view all the answers