The completed assembly of the holoenzyme with transcription factors and RNA polymerase II bound to the promoter forms the eukaryotic transcription initiation complex. Transcription in the archaea domain is similar to transcription in eukaryotes.
Transcription begins with matching of NTPs to the first and second in the DNA sequence.  This, like most of the remainder of transcription, is an energy-dependent process, consuming adenosine triphosphate (ATP) or other NTP.