If the RNA polymerase attaches to the promoter region of the gene, would it form the initial mRNA portion soon after attachment by reading the promoter region? Or should it slide across the DNA then form the initial mRNA portion?
Also, does the RNA polymerase read DNA base pairs one by one and add the RNA base pairs to the chain one by one? Or, does it read groups of base pairs just like tRNA which reads triplet of bases during translation?
Similarly, is the terminator region transcribed too and then the process of transcription ends, or does the process end immediately after the RNA polymerase reaches the terminator region? How does the process end just by reading the terminator region?
So, should the promoter and terminator region of a gene be considered parts of the gene or separate entities?