Question

Which of the following is true about restriction endonucleases (REs)?

a. A hypothetical RE that is a 3 cutter would cut every ~32 base pairs in a sequence.

b. Bacterial cells can contain multiple REs that recognize different DNA sequences.

c. Bacterial species are named for the REs that are present in their cytoplasm.

d. Most commercially available REs are purified from their species of origin.