🏥 USMLE Exam Prep

During prokaryotic DNA replication, which enzyme is primarily responsible for removing RNA primers and replacing them with DNA nucleotides?

A DNA ligase
B DNA polymerase III
C DNA gyrase
D DNA polymerase I

✓ Correct Answer: Option D

DNA polymerase I has 5'→3' exonuclease activity to remove RNA primers and 5'→3' polymerase activity to fill in the gaps with DNA, a unique function in prokaryotic DNA replication.

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