When comparing DNA polymerase I and DNA polymerase III functions, we find that Group of answer choices both DNA polymerases have exonuclease activity. only DNA polymerase I adds a nucleotide to the 3' end of a polynucleotide. both DNA polymerases add a nucleotide to the 5' end of a polynucleotide. only DNA polymerase III has polymerase activity. both DNA polymerases replace an RNA nucleotide with a DNA nucleotide.

Explanation:

1. DNA polymerases are enzymes which replicates DNA during S phase of cell cycle.

2.Both eukaryotes and prokaryotes contain DNA polymerase enzymes.

3. As here, DNA pol I and DNA pol III functions; both DNA polymerases have exonuclease activity as, If the polymerase detects an incorrectly paired nucleotide it has been added, it will remove and replace that incorrectly paired nucleotide with correct  nucleotide.

4. Both  DNA polymerase I and III adds a nucleotide to the 3' end of a polynucleotide.