E.coli Topoisomerase III (I)contains a Hole Capable of Holding Duplex DNA That Is

Multiple Choice

E.coli topoisomerase III
(I) contains a hole capable of holding duplex DNA that is lined with negatively charged residues.
(II) binds the sugar-phosphate backbone such that base recognition is possible.
(III) functions by nucleophilic attack on the binding phosphate group.

A) I,II
B) II,III
C) I,III
D) I only
E) II only