Problem: The restriction enzyme BamHI is produced by certain strains of Bacillus amyloliquefaciens. The enzyme, which recognizes the sequence GGATCC, does not destroy the DNA of the bacterium in which it is produced because? Need Assignment Help?
A. All of the BamHI sites in the Bacillus DNA are methylated preventing BamHI from recognizing them.
B BamHI inside the cell is inactive and only becomes active when it is secreted.
C Bacillus DNA does not contain any of the sequences BamHI recognizes.
D All cells that produce BamHI also produce an inhibitor that binds to BamHI and prevents it from acting.
E BamHI cleavage sites are rapidly repaired by enzymes that repair damage to DNA.