What is a Virion

Question

What is a virion?
A) a virus genome inside a cell
B) an empty capsid
C) a single virus particle outside a cell
D) an extracellular virus genome
E) a virus genome integrated into a host cell genome

Accepted Answer

A virion is a single, complete virus particle that exists outside of a host cell. It usually consists of a nucleic acid genome (DNA or RNA) surrounded by a protein capsid.

Note: Options A, B, and D are not correct, as they do not describe a complete virus particle outside of a host cell. Option E describes a provirus, which is a virus genome integrated into a host cell genome, but it is not equivalent to a virion.