Question

$pBR _{322}$, which is frequently used as a vector for cloning gene in $E$. coli is a/an

• A. original bacterial plasmid
• B. modified bacterial plasmid
• C. viral genome
• D. transposon

Answer 1

Answer: (B)

modified bacterial plasmid

Answer 2

E. coli plasmid $pBR _{322}$ is the most versatile and widely used cloning vector, it contains both ampicillin and tetracyclin-resistance genes and a number of unique restriction enzyme cleavage sites.