Which of These is the Best Description of a Virus

Question

Which of these is the best description of a virus?
A)a noncellular living organism
B)the smallest bacteria known
C)a member of the kingdom Virusae
D)an invasive cell
E)chemical complexes of RNA or DNA protected by a protein shell

Accepted Answer

Viruses are not considered living organisms; they are chemical complexes of RNA or DNA encased in a protein shell, lacking cellular structure and the ability to reproduce independently.