試題詳解

複選題
21. During the elongation stage of transcription________.
(A) DNA'nucleotides are added to the transcript
(B) the transcript grows in the 5' to 3' direction
(C) transcription factors recruit RNA polymerase to the template strand
(D) the double helix remains single-stranded after being used as a template
(E) RNA polymerase binds to the promoter region