Restriction endonucleases are most widely used in recombinant DNA technology. They are obtained from

Options

A. Bacteriophages
B. Bacterial cells
C. Plasmids
D. All prokaryotic cells

Answer

B

Explanation

In 1963 Steward Linn and Werner Arber isolated two enzymes from E. coli that constrained the growth of bacteriophage in bacteria. The most widely used restriction enzyme is ECORI that was isolated from the bacteria Escherichia coli RY 13.