Which of the following activities does E. coli DNA polymerase III lack ?
A) 5' → 3' polymerase
B) 5' → 3' exonuclease
C) 3' → 5' exonuclease
D) E. coli DNA polymerase III has ALL of the above activities.

Question

Quizplus · Accepted Answer

E. coli DNA polymerase III has 5' → 3' polymerase activity, which is essential for DNA synthesis, and 3' → 5' exonuclease activity, which is crucial for proofreading and correcting errors. However, it lacks 5' → 3' exonuclease activity, which is involved in removing nucleotides from the 5' end of DNA. This activity is found in other DNA polymerases, such as DNA polymerase I in E. coli, which uses it for tasks like removing RNA primers during DNA replication.

Which of the Following Activities Does E