_____ are regulatory proteins that bind to promoter DNA and affect the recruitment of RNA polymerases in eukaryotes.

_____ are regulatory proteins that bind to promoter DNA and affect the recruitment of RNA polymerases in eukaryotes.

• A. Enhancers
• B. Activators
• C. Silencers
• D. Transcription factors

Answer: (D)

Transcription factors are the proteins that directly interact with promoter DNA to influence how RNA polymerase II is recruited to the promoter and to assemble the transcription initiation machinery. In eukaryotes, initiation requires general transcription factors that form a pre-initiation complex with RNA Pol II at the core promoter, plus regulatory transcription factors that bind promoter-proximal elements or nearby sequences to modulate recruitment, chromatin structure, and overall transcription levels. Enhancers and silencers are DNA elements that recruit activators or repressors, often acting at a distance, but the proteins that directly bind promoter DNA to regulate RNA polymerase recruitment are transcription factors.

Transcription factors are the proteins that directly interact with promoter DNA to influence how RNA polymerase II is recruited to the promoter and to assemble the transcription initiation machinery. In eukaryotes, initiation requires general transcription factors that form a pre-initiation complex with RNA Pol II at the core promoter, plus regulatory transcription factors that bind promoter-proximal elements or nearby sequences to modulate recruitment, chromatin structure, and overall transcription levels. Enhancers and silencers are DNA elements that recruit activators or repressors, often acting at a distance, but the proteins that directly bind promoter DNA to regulate RNA polymerase recruitment are transcription factors.