Regulation of the lac operon in E. coli (see Chapter 16)...

Question

Regulation of the lac operon in E. coli (see Chapter 16) and regulation of the GAL system in yeast are analogous in that they both serve to adapt cells to growth on different carbon sources. However, the transcriptional changes are accomplished very differently. Consider the conceptual similarities and differences as you address the following.

Compare and contrast the cis-regulatory elements of the lac operon and GAL gene system.

Accepted Answer

Everyone. Let's take a look at this question together. In the presence of galactose, blank binds directly to galactose and undergoes a conformational change that allows it to bind G. A. L. A. D. P. Relieving blank inhibition and activating the G. A. L. Structure. So here we can see we have a G A L. Four P. Homo dimmer, G A L. A. D. P. Homo dimmer and G A. L. Three P. That is binding to galactose. And so in the presence of galactose which we see here, we can see that we have that G. A. L. Three P which is binding directly to galactose and allows it to bind to this G. A L. A. D. P. Which when we have no galactose we can see that that G A L. A. D. P is bind ID to the G. A. L. For P. Hamad Eimer and inhibiting that transcription. But when we have the presence of galactose you can see that we do not have that inhibition and we have the activation of the G. A. L. Structural genes. Which means that in the presence of galactose, G A L. Three P binds directly to galactose and undergoes a conformational change that allows it to bind to G. A. L. A. T. P. Relieving that G A. L. Or P inhibition and activating the G A. L. Structural genes. So that means that answer choice C. Is the correct answer because when we have that presence of galactose V. A. L. Three P binds directly to galactose and undergoes that conformational change, allowing it to bind the G. A. L. a d P, relieving G a L four P inhibition and activating the g a L. Structural genes. So answer choice C is the correct answer. I hope you found this video to be helpful. Thank you and goodbye.

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