DNA repair proofreading in prokaryotes are caused by: (A) DNA Polymerase I, (B) DNA Polymerase II, (C) DNA Polymerase III, (D) Gyrase
Answer is B. The in vivo functionality of Pol II is under debate, yet consensus shows that Pol II is primarily involved as a backup enzyme in prokaryotic DNA replication.The enzyme has 5' - 3' DNA synthesis capability as well as 3' - 5' exonuclease proofreading activity.DNA Pol II interacts with multiple binding paners common with DNA Pol III in order to enhance its fidelity