Final answer:
Viruses are not prokaryotic or eukaryotic cells. They lack the necessary structures to function as cells on their own and depend on host cells for replication.
Step-by-step explanation:
A virus is not a prokaryotic or eukaryotic cell. It is essentially genetic material surrounded by protein. Viruses lack a cell membrane, cytoplasm, ribosomes, and other cell organelles, so they cannot make proteins or reproduce on their own. Instead, viruses depend on a host cell to synthesize their proteins and make copies of themselves.