Refer to the figure above and then answer the question that follows.
-Which statement about restriction enzymes is true?
A) Millions of different ones have been identified so far.
B) They cut only one strand of DNA to produce a fragment.
C) They are isolated from human cells, which naturally produce them.
D) They cut any DNA with their recognition sequence.

Question

Refer to the figure above and then answer the question that follows.
-Which statement about restriction enzymes is true?
A) Millions of different ones have been identified so far. 
B) They cut only one strand of DNA to produce a fragment. 
C) They are isolated from human cells, which naturally produce them. 
D) They cut any DNA with their recognition sequence.

Quizplus · Accepted Answer

Restriction enzymes, also known as restriction endonucleases, recognize specific sequences of DNA and cut both strands at these sites, not just one. They are not isolated from human cells but rather from bacteria, where they serve as a defense mechanism against viruses. While there are many restriction enzymes identified, the number is not in the millions.

Refer to the Figure Above and Then Answer the Question