Gene Control Part 2 (Prokaryotes): The Operon

Gene Control in Prokaryotes. The Operon Model

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  Education

[Craig Savage]

Your teacher is correct. Those things can happen, but usually they are taught with Eukaryotic gene control. In this video I just focused on the operon. Check out my video on Eukryotic gene control for more info.

[Brian Witte]

A significant point - Archaea generally do not have genes in operons. Archaeal gene expression is much closer to that of Eukaryotes (although it varies by which groups of Archaea you consider).



[Craig Savage]

Very good point

[Meni Fo]

Until two days ago I couldn't tell the difference between the DNA and a Gene. In just two days I was able to really comprehend not only which is which, but to also have a very good understanding of how the function. And all that, thanks to your very elaborate, pleasant to watch, and clear to understand videos Craig. Thank you!!!

[Andrea Banuelos]

As I walked out of lecture today, I was utterly confused about the gene control. After watching your video, I have a much clearer idea. Thank you so much!

[mistywind08]

Very easy to understand. Great video!

Thank you!

[MrRsutom]

that is a great stuff you have but i need to see where IF2 and IF3 work.

[LynxAQ]

A few errors in the video. It is allolactose (an isomer of lactose) not lactose that binds to the repressor protein in the lac operon. Also RNA polymerase is still able to perform transcription without CAP/cAMP complex just at a much lower rate. The only thing the CAP/cAMP complex does is increase the affinity of RNA polymerase to the promoter region therefore increase the chance RNA polymerase will bind and in turn increase the speed of lac operon transcription.

[rbx32]

Very helpful. Thank you very much!

[lidacaine]

You sir, give some of the best verbal and visual descriptions I've ever heard/seen. I'm taking a genetics class at a university, and I have learned more from an hour watching your videos, than I have in my last 5 genetics classes. It has to take FOREVER to put those videos together! You seem very dedicated to your work, and you're very good at teaching. Seriously awesome work! Thank you!

[Christopher Foley]

When the gene is open for transcription and the RNA can go on and read it, how is the overall quantity of the resulting protein controlled? Is it the case that the RNA keeps going back over and reading the gene over and over until the gene is eventually disabled and it can't be read?

Really informative video thanks.

[intan faizurah]

awesomeeeeeeeee thank you !