[Campbell Biology P.392] In eukaryotic transcription, what is the primary role of the TATA b... | Practice Question

In eukaryotic transcription, what is the primary role of the TATA box and associated transcription factors as illustrated in Figure 17.9?

  • A: To directly synthesize the mRNA transcript.
  • B: To serve as the recognition site for RNA polymerase I binding.
  • C: To ensure RNA polymerase II binds in the correct position and orientation at the promoter.
  • D: To prevent the unwinding of the DNA double helix during transcription.

Explanation

Figure 17.9 and its description state that several transcription factors, including one recognizing the TATA box, bind to the DNA before RNA polymerase II can bind in the correct position and orientation. This complex transcription initiation complex then ensures RNA synthesis begins at the start point.