Write a brief essay that discusses why you think regulatory systems evolved in bacteria (i.e., what advantages do regulatory systems provide to these organisms?), and, in the context of regulation, discuss why genes related to common functions are found together in operons.

Video transcript

Welcome back everyone, here's our next problem in Escherichia coli the blank is necessary for the breakdown of the five carbon sugar. El araby nose. So let's think about um from our condo videos, what is needed for the breakdown of revenues and that is here in Choice B the era opteron. And of course you have a good clue by the name itself. Since it's the first letters of the revenues. Um This contains the enzymes needed to digest A. Revenues. So three structural genes and then it has positive and negative regulatory elements including the camp cap protein and the regulatory protein. RSC. Now let's look through our other answer choices. Choice A. Is the lack opera on that of course controls the expression of the genes that digest lactose, not a ravenous. So that's why Choice A. Is not our answer. We'll cross that out. Choice C. Is the Trp opera. Um This controls genes uh for the bio synthesis of tryptophan. So not our answer here and then finally, Choice D. The gao opera. And the gao opera codes controls expression of genes related to digestion of galactus. So the wrong sugar for what we're looking for. So that's why Choice D. Isn't the answer either. Again in E coli the choice B. R. A. Opera on a. R. A. Is necessary for the breakdown of the five carbon sugar. El araby knows. See you in the next video