What is the likely effect of each of the following mutat...

Question

What is the likely effect of each of the following mutations of the trpL region on attenuation control of trp operon gene transcription? Explain your reasoning.

Region 3 is deleted.

Accepted Answer

Hi, everyone. Welcome back. Let's look at our next question. A deletion of the attenuated stem loop on attenuation control of trip operon gene transcription may result in choice. A decreased attenuation control. Choice B increased attenuation control choice C no effect on attenuation control or choice D complete stop of the trip operant. So let's think about and recall what attenuation control is. And you think of attenuation, it's a premature hot of transcription and it happens through the formation of two different possible stem loop arrangements in the R N A transcript when trip concentration is low. So the cell needs more trip to the ribosome has to pause when it reaches the two trip codons at the beginning of the leader peptide sequence that causes the formation of the anti terminator stem loop structure. And transcription continues wind trip concentration or levels are high. Then the ribosome continues without needing to pause at the trip codons. And you have the formation of the attenuated stem loop and transcription stops. So now we're going to consider the situation where we have deleted the attenuated stem loop. So the formation of the attenuated stem loop step cannot take place and what happens? Our question says to attenuation control over the trip OPERON. Well, attenuation control, we recall makes this transcription stop. So choice D can be eliminated right away because it's saying that the trip OPERON would stop being transcribed. But that's what attenuation does. So, deleting the attenuated stem loop will definitely not stop the trip OPERON, we can also expect that choice C is not our answer since that has no effect on attenuation control. But since that stem loop structure is the way that control takes place, you wouldn't expect to see a deletion of it having no effect. So again, if the attenuated stem loop is deleted, that's what actually stops transcription. So you would see choice a decreased attenuation control because it doesn't have the mechanism for that attenuation to take place. Choice B is increased attenuation control. And obviously, we're not going to see that. So we can eliminate that and confirm that. Yes. A deletion of the attenuated stem loop will result in choice. A decreased attenuation control. See you in the next video.

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What is the likely effect of each of the following mutations of the trpL region on attenuation control of trp operon gene transcription? Explain your reasoning.

Region 3 is deleted.

My Courses

Chemistry

Biology

Math

Physics

Business

Social Sciences

Programming

Product & Marketing

What is the likely effect of each of the following mutations of the trpL region on attenuation control of trp operon gene transcription? Explain your reasoning.Region 3 is deleted.

What is the likely effect of each of the following mutations of the trpL region on attenuation control of trp operon gene transcription? Explain your reasoning.

Region 3 is deleted.