Question: is exonuclease dna polymerase 1?
Answer: DNA polymerase I is a single polypeptide chain with 928 amino acids and molecular weight of 109 kDa. ... This exonuclease activity is called the proofreading or editing function of DNA polymerase I. Pol I also has a unique 5′ to 3′ exonuclease activity that is required for its DNA repair function.