Question

Question 2 0/2 pts Certain bacteria always degrade "foreign" DNA when they are introduced to it. What keeps the bacteria from degrading their own DNA? The bacteria's own DNA is protected from cleavage through chemical modifications. The bacteria's own DNA is composed of different sequences The bacteria's own DNA is hidden away inside a different internal structure The bacteria's own DNA is selective for only foreign DNA as a result of "cell memory" The bacteria's own DNA has evolved past many other organizims, making identification and targetting of certain foreign DNA sequences easier No answer text provided.

Answer 1

restriction enzymes digest the foreign DNA, restriction enzymes are enzymes which cut the specific DNA sequences.

but bacterial DNA is protected from the restriction enzyme digestion because the bacterial DNA is methylated, so the answer is A) bacterias own DNA is protected from cleavage through chemical modifications.