Question
Biology Question on biotechnology
Which of the following is a plasmid?
A
pBR 322
B
BamH I
C
Sal I
D
EcoR I
Answer
pBR 322
Explanation
Solution
Plasmid vectors are extra-chromosomal, selfreplicating, usually circular, double-stranded DNA molecules, found naturally in many bacteria and also in some yeast. pBR322 vector was the first artificial cloning vector constructed in 1977 by Boliver and Rodriguez. It is widely used in gene cloning experiments.