Culturing viruses in a laboratory is more complicated than culturing bacteria because a. viruses must be cocultured with a host cell. b. viruses are so small. c. all viruses are dangerous to humans. d. viruses must be cocultured with another virus.

Answer: Option A) viruses must be cocultured with a host cell.

Explanation:

Viruses are very minute disease-causing organisms with DNA or RNA enclosed in a protein coat, and replicate only in the cells of a living host.

Unlike bacteria that could live on its own (invitro), the compulsory need to coculture viruses with a host cell complicates its culturing in the laboratory.