Transcription takes place in DNA bubbles that differ from DNA replication bubbles because Group of answer choices A. transcription bubbles do not expand in both directions. B. transcription bubbles do not transcribe all of the genomic DNA. C. transcription bubbles do not use both strands as template. D. transcription bubbles produce a single-stranded product (RNA, not DNA). E. All of the above (A, B, C and D) are correct..