The DNA fragments have sticky ends due to___________?
Correct answer: B. Unpaired bases
- A. Endonuclease
- B. Unpaired bases
- C. Calcium ions
- D. Free methylation
Explanation
Restriction enzymes can cut the two DNA strands at staggered positions, leaving short single-stranded overhangs called sticky ends, which are unpaired bases. Endonuclease is the likely distractor because it makes the cut, but the sticky character specifically results from the exposed unpaired bases.
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