In the following schematic drawing, two DNA molecules are shown before and after the action of a protein that is also involved in the process of DNA replication. What is this protein called?
A) DNA ligase
B) DNA helicase
C) DNA polymerase I
D) DNA topoisomerase I
E) DNA topoisomerase II

Question

In the following schematic drawing, two DNA molecules are shown before and after the action of a protein that is also involved in the process of DNA replication. What is this protein called? 
A) DNA ligase 
B) DNA helicase 
C) DNA polymerase I 
D) DNA topoisomerase I 
E) DNA topoisomerase II

Quizplus · Accepted Answer

This untangling of intertwined DNA is mediated by the enzyme topoisomerase II. This type of reaction helps solve the winding problem during replication.

In the Following Schematic Drawing, Two DNA Molecules Are Shown