Multiple choice

Which of the following enzymes participates in the repair of DNA by catalyzing the addition of mononucleotide units?

  1. Polymerase I

  2. Polymerase II

  3. Polymerase III

  4. DNA methyltransferase
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A Correct answer
Explanation

DNA Polymerase I is primarily responsible for DNA repair and the removal of RNA primers. It possesses 5' to 3' exonuclease activity and 5' to 3' polymerase activity, allowing it to fill gaps in DNA.

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