| DNA polymerase | 5′→ 3′ polymerase activity | 3′→ 5′ exonuclease activity | 5′→ 3′ exonuclease activity | Function |
|---|---|---|---|---|
| I | Yes | Yes | Yes | Removes and replaces primers |
| III | Yes | Yes | No | Elongates DNA |
|
Note: DNA polymerases II, IV, and V are involved in DNA repair and translesion synthesis. |
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