Final answer:
TFIID is the commitment factor for RNA polymerase II involved in initiating transcription by binding to the TATA box and recruiting other transcription factors and RNA polymerase II.
Step-by-step explanation:
The commitment factor for RNA polymerase II that directly specifies the startpoint for transcription and contains TBP as one of its subunits is TFIID. TFIID is the first transcription factor to bind to the TATA box within the core promoter region, and it recruits other general transcription factors and RNA polymerase II to form the transcription initiation complex. This complex is essential for the proper initiation of transcription in eukaryotic cells.