In the event of a mismatched nucleotide , which molecule is able to backtrack , "proofread , " and correct the nucleotide sequence ? A. DNA Proofreadase
B. DNA Polymerase
C. DNA Helicase
D. DNA Primase

The molecule that is able to get back to the correct the errors in the DNA is DNA Polymerase.

Hence the option B is correct.

Learn more about the mismatched nucleotide , which molecule.

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The molecule that is able to go back and correct an error in the DNA nucleotide sequence is DNA polymerase (option B).

Explanation:

DNA polymerase is not only the enzyme that contributes to the polymerization of a new DNA strand during the replication process, but it can also correct errors in synthesis, such as when a mismatched nucleotide is placed.

Once an error has been detected during synthesis, the DNA polymerase —acting as a 3'-5'- exonuclease— reverses the process, the direction of synthesis, to correct the error which in this case is the mismatched nucleotide.

The other options are not correct because:

   A. DNA proofreadasa does not exist.

    C. Helicase breaks the hydrogen bridges that bind the nucleotides allowing the separation of the DNA strands. In some cases, it also acts as a DNA repairer

    D. DNA Primase is responsible for the synthesis of primers.