AGB-0029
QUESTION
The restriction endonuclease and the corresponding methylase are sometimes referred to as?
OPTIONS
(A) Endonuclease system
(B) Host protection
(C) Restriction guest protection
(D) Restriction modification system
ANSWER
(D) Restriction modification system
EXPLANATION
A restriction-modification system consists of a restriction endonuclease and a corresponding DNA methylase. The restriction enzyme recognizes and cleaves particular DNA sequences, while methylation protects the host's own DNA from cleavage. The other terms do not correctly name this paired system.