Multiple choice

A virion is a

  1. naked and infectious piece of RNA

  2. complete and infectious virus particle

  3. nucleic acid without a capsid

  4. a naked and infectious piece of DNA

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

A virion is the complete, extracellular infectious form of a virus - consisting of nucleic acid (DNA or RNA) enclosed in a protein capsid. Options A and D describe only the nucleic acid component without the capsid, while option C lacks the capsid. Only option B correctly describes the complete virus particle.