Question

During gene expression, what must occur prior to a gene being expressed? A. Transcription factor must bind to the regulatory region within the cell’s nucleus. B. RNA must be converted to mRNA. C. The coding region must separate from the regulatory region. D. RNA polymerase must inhibit the process of changing RNA to mRNA.

Answer 1

Prior to a gene being expressed, it is necessary that the transcription factor binds to the regulatory region within the cell's nucleus. Correct answer: A.
All the other options are either incorrect (option D) or are part already of the gene expression and might not be present within prokaryotic organisms (options B and C).