DNA can repair itself if damaged. What enzyme 'snips' out the damaged portions of the molecule?

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Multiple Choice

DNA can repair itself if damaged. What enzyme 'snips' out the damaged portions of the molecule?

Explanation:
DNA repair starts by removing the damaged segment, and that job is done by nucleases, enzymes that cut DNA strands. By excising the damaged nucleotides, a gap is created that DNA polymerase fills with the correct sequence, and DNA ligase seals the final nick to restore continuity. The other enzymes play support roles in the process: helicase unwinds the DNA to allow access, and polymerase synthesizes new DNA, but it is the nuclease that actually snips out the damaged portion.

DNA repair starts by removing the damaged segment, and that job is done by nucleases, enzymes that cut DNA strands. By excising the damaged nucleotides, a gap is created that DNA polymerase fills with the correct sequence, and DNA ligase seals the final nick to restore continuity. The other enzymes play support roles in the process: helicase unwinds the DNA to allow access, and polymerase synthesizes new DNA, but it is the nuclease that actually snips out the damaged portion.

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