Transcription

I think this video is very helpful, but I also think it would be even more helpful if it showed the matching of RNA nucleotide bases to the DNA template. Also, this should show that after the polyadenylation signal is reached, the RNA polymerase slows down to make about 20-30 more nucleotide bases, and THEN the RNA polymerase drops off.

i agree
it seems as if mRNA is just a long string.
it doesn't show the individual nucleotides.

@JellyBelly903----with the introns and exons that's rna processing, (premrna-->mrna) which is in another video....you can look at unzipping in the dna replication videos

green one is TFIIF

It's an exceptional animation of DNA transcription in youtube but could anyone tell me what the transfactor is? the green one like mushroom& red one.THX

G and C triple hydrogen bond while A and T only double bond. your theory may be right :P

Introns and Exons are only important during mRNA processing, which is another video. I was also disapointed that they did not lable the helicase (what originally unwinds the DNA double helix). This video is actually pretty simplified considering all the proteins that are involved.

Helicase only plays a role in DNA replication. In transcription the RNA polymerase creates an open complex that is about 10-15 base pairs knows as a "transcription bubble". It seals itself as the RNA polymerase moves along.

RNA transcription also requires a helicase. In eukaryote cells it's TFIIH, which both "melts" the strands and then phosphorylizes the polymerase on its C-terminal domain.

Cheers