What chemical modification of host DNA is used to protect it against cleavage by the host's own restriction enzymes?

Question

Quizplus · Accepted Answer

The chemical modification of host DNA that is used to protect it against cleavage by the host's own restriction enzymes is methylation. Methylation involves the addition of a methyl group to the DNA molecule, typically at specific sites on the cytosine base. This modification serves as a signal to the restriction enzymes that these sites should not be targeted for cleavage, allowing the host DNA to remain intact.

What Chemical Modification of Host DNA Is Used to Protect