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

Question

Quizplus · Accepted Answer

Bacteria protect their own DNA from restriction enzymes by methylating or otherwise chemically modifying the bases within their restriction sites, which prevents the enzymes from recognizing and cutting these sites.

Bacteria Protect Restriction Sites in Their Own DNA from Being