Which is a common bacterial host in plasmid cloning?

Correct answer: E. coli

E. coli is the most commonly used bacterial host for plasmid cloning because it grows rapidly, is easy to culture in the laboratory, and has many available cloning strains. Bacillus subtilis is also a bacterium, but E. coli is used more routinely for standard plasmid cloning. Exam tip: For a typical cloning host question, E. coli is usually the expected answer.