Bacteria protect themselves from their own restriction enzymes by
A) means of their blunt ends.
B) means of their sticky ends.
C) adding methyl groups at restriction sites.
D) means of DNA ligase.
E) transforming themselves.

Question

Quizplus · Accepted Answer

Bacteria add methyl groups to their own DNA at restriction sites to protect themselves from their own restriction enzymes. This modification prevents the restriction enzyme from recognizing and cleaving the DNA at that site.

Bacteria Protect Themselves from Their Own Restriction Enzymes by