In transcription, __________.

• A. the promoter region acts as an initial binding site for RNA polymerase
• B. only one of the DNA strands is used as the template
• C. the RNA nucleotides used are produced by the cell
• D. All of the answer choices are correct.

Answer: (D)

Verified step by step guidance

1. Understand that transcription is the process by which the information in a DNA sequence is copied into a complementary RNA sequence.
2. Recognize that the promoter region is a specific sequence of DNA that acts as a binding site for RNA polymerase, initiating transcription.
3. Identify that during transcription, only one of the two DNA strands serves as the template strand for RNA synthesis. This strand is read by RNA polymerase to create a complementary RNA strand.
4. Acknowledge that the RNA nucleotides used in transcription are synthesized by the cell and are available in the nucleus to be incorporated into the growing RNA strand.
5. Conclude that all the given statements are correct, as they accurately describe different aspects of the transcription process.