What is the function of DNA polymerase III?
A) to unwind the DNA helix during replication
B) to seal together the broken ends of DNA strands
C) to add nucleotides to the 3' end of a growing DNA strand
D) to degrade damaged DNA molecules
E) to rejoin the two DNA strands (one new and one old) after replication

Question

Quizplus · Accepted Answer

DNA polymerase III is the main polymerase responsible for adding nucleotides to the 3' end of a growing DNA strand during replication.

Answer: A, E are incorrect as DNA helicase is responsible for unwinding the DNA helix, and DNA ligase joins the newly synthesized DNA fragments together. B and D are also incorrect as DNA polymerase III does not seal or degrade damaged DNA molecules.

What Is the Function of DNA Polymerase III