Choose all statements that accurately describe the transcription bubble.

A. It moves along the DNA at a rate of about 50 nt/sec It is stationary, with the DNA strand slowly threaded through it at a rate of about 50 nt/sec

B. The growing RNA strand protrudes from the bubble It contains an RNA-DNA hybrid, about 9 nt long

C. The newly made RNA within the bubble makes a single nucleotide contact with DNA at the 3' end

D. The growing RNA is compacted it within a specialized compartment inside the bubble