Which one of the following remove nucleotides from the ends of DNA or RNA?
Correct answer: B. Exonuclease
- A. Endonuclease
- B. Exonuclease
- C. S 1 nuclease
- D. Deoxyribonuclease
Explanation
Exonucleases remove nucleotides one at a time from the free ends of DNA or RNA strands. An endonuclease cuts within a nucleic-acid strand, so students who confuse end cutting with internal cutting may choose a.
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