What can DNA Polymerase repair?

What can DNA Polymerase repair?

• A. It increases mutation rate.
• B. It bonds nucleotides into RNA.
• C. It converts DNA to RNA.
• D. It can repair DNA damage caused by radiation and toxins.

Answer: (D)

DNA polymerases are specialized enzymes that do more than just build new DNA strands. They also help repair DNA when it has been damaged. Their proofreading ability reduces errors during replication, and they participate in repair pathways that address damage from radiation and toxins. After such damage is recognized and removed, DNA polymerase fills in the resulting gaps with the correct nucleotides and works with other enzymes to seal the DNA, restoring the original sequence. This repair function directly addresses damage caused by radiation and toxins, which is why it is the best choice. The other statements misrepresent what DNA polymerase does: it does not create RNA (that’s the job of RNA polymerase), it does not convert DNA into RNA, and it doesn’t generally increase mutation rates because its fidelity and repair roles tend to decrease errors.

DNA polymerases are specialized enzymes that do more than just build new DNA strands. They also help repair DNA when it has been damaged. Their proofreading ability reduces errors during replication, and they participate in repair pathways that address damage from radiation and toxins. After such damage is recognized and removed, DNA polymerase fills in the resulting gaps with the correct nucleotides and works with other enzymes to seal the DNA, restoring the original sequence. This repair function directly addresses damage caused by radiation and toxins, which is why it is the best choice. The other statements misrepresent what DNA polymerase does: it does not create RNA (that’s the job of RNA polymerase), it does not convert DNA into RNA, and it doesn’t generally increase mutation rates because its fidelity and repair roles tend to decrease errors.