Question

What is the basic biological nature of plasmids when used as cloning vectors?

Options

• Proteins that facilitate bacterial conjugation

• Circular DNA molecules in bacteria

• Viruses that infect bacteria

• Single-stranded linear RNA molecules in eukaryotes

Answer 1

Plasmids are circular DNA molecules found in bacteria that serve as common cloning vectors. In contrast, bacteriophages are viruses that infect bacteria.