What is a Virus

Question

What is a virus?
A) an organism in domain Archaea
B) an organism in kingdom Protista
C) an organism in domain Bacteria
D) a non-living particle

Accepted Answer

A virus is a non-living particle that requires a host cell to replicate and cause infection. It cannot be classified as an organism since it cannot carry out metabolic processes or reproduce independently. Viruses have genetic material (either DNA or RNA) surrounded by a protein coat, and some may also have a lipid envelope. They are considered on the edge between living and non-living entities.