What Is the Correct Order for the Following Events in Excision

Multiple Choice

What is the correct order for the following events in excision repair of DNA? (1) DNA polymerase I adds correct bases by 5´ to 3´ replication; (2) damaged bases are recognized; (3) DNA ligase seals the new strand to existing DNA; (4) part of a single strand is excised.

A) 1, 2, 3, 4
B) 2, 1, 3, 4
C) 2, 4, 1, 3
D) 3, 4, 2, 1
E) 4, 2, 3, 1