In which phase of transcription does the RNA polymerase attach to the promoter sequence of DNA?

• A. Splicing
• B. Termination
• C. Initiation
• D. Elongation

Answer: (C)

Verified step by step guidance

1. Understand the process of transcription, which is the synthesis of RNA from a DNA template.
2. Identify the key phases of transcription: initiation, elongation, and termination.
3. Recognize that during the initiation phase, RNA polymerase binds to a specific region of the DNA called the promoter.
4. The promoter sequence is crucial as it signals the RNA polymerase where to start transcribing the DNA into RNA.
5. Conclude that the phase where RNA polymerase attaches to the promoter sequence is the initiation phase of transcription.