Question

DNA polymerases I, III, and delta have important roles in replication. Which of these proteins have similar functions? Describe those similar functions that they share. Which one performs a different function and what is that function?

Answer 1

•DNA Polymerase 1This repair polymerase is involved in excision repair with both 3'–5' and 5'–3' exonuclease activity and processing of Okazaki fragments generated during lagging strand synthesis

•DNA polymerase III has 3 functions: Selects and adds free deoxyribonucleoside triphosphates complementary to the DNA template strand..

•Pol δ primarily replicates the lagging strand; however, recent evidence suggested that Pol δ might have a role in replicating the leading strand of DNA as well.

polymerase divide into families on the basis of sequence homology  

DNA polymerase delta and 3 have same feature and function that is 3 to 5 exonuclease proofreading.