Put the following events of bacterial transcription initiation in chronological order.
(1) Sigma binds to the promoter region.
(2) Sigma binds to RNA polymerase.
(3) Sigma is released.
(4) Transcription begins.
Select one:
O a. 2, 1, 3, 4
O b. 2, 1, 4, 3
O c. 4, 2, 1, 3
Od. 1, 2, 3, 4