Bacteria Protect Restriction Sites in Their Own DNA from Being

Multiple Choice

Bacteria protect restriction sites in their own DNA from being cut by restriction enzymes by ____.

A) synthesizing low quantities of restriction enzymes
B) producing restriction enzymes that do not recognize sequences in their own DNA
C) chemically modifying bases within the restriction sites
D) only activating restriction enzymes when foreign DNA is present in the cell
E) inactivating restriction enzymes through phosphorylation