Which enzyme removes the RNA primers and fills the gaps in prokaryotic DNA replication?
Answer and explanation
Correct answer: B. DNA polymerase I
- Step 1: DNA polymerase I has 5' to 3' exonuclease activity that removes primers. Step 2. It also fills the gap with DNA, and ligase seals the nick. Answer: DNA polymerase I. Why not the others: polymerase III is the main replicating enzyme, helicase unwinds DNA and primase makes the primers.
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