The biological role of restriction enzymes in bacteria is to:
A) repair DNA.
B) induce DNA crossover.
C) cleave foreign DNA.
D) All of the above.
E) None of the above.

Question

Quizplus · Accepted Answer

Restriction enzymes in bacteria recognize specific DNA sequences and cleave foreign DNA that contains these sequences. This is a defense mechanism against foreign DNA such as viral genomes that can infect the bacteria. Repairing DNA or inducing DNA crossover are not functions of restriction enzymes.

The Biological Role of Restriction Enzymes in Bacteria Is To