What is the likely effect of each of the following mutations o...

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. The entire polypeptide coding sequence of trpL is deleted.

Accepted Answer

Welcome back, everyone. Here's our next question. What is the likely effect of a mutation causing the deletion of the entire polypeptide encoding sequence of a gene choice? A, the production of a nonfunctional protein from the gene. Choice B, no effect on the production of the protein from the gene. Choice C, the production of a shorter protein with an altered function or choice D the complete loss of protein production from the gene. Well, if we have the entire polypeptide encoding sequence deleted, we are going to suffer choice D A complete loss of protein production. The coding coding sequence is of course, what specifies the amino acids that make up the protein. If you delete the whole code, you don't produce any protein at all. So no code equals no protein. When we look at our other answer, choices, choice A has a nonfunctional protein. Again, you'd have to have some code there to produce something. You won't get any amino acids if your coding portion is, portion is gone. So a nonfunctional protein would result if you maybe have uh a mutation causing the wrong amino acid or deleting a portion of it, but you won't have just, you won't have a nonfunctional protein resulting with no code at all. Choice B, no effect on the production. That's a pretty obvious one, not to be our answer. Because if you lose the whole code, you're definitely going to see a drastic effect and choice C production of a shorter protein. Again, that would be the most likely result of a deletion of port a portion of the code, not deletion of the entire code itself. So again, a mutation that causes you to lose the entire co peptide encoding region of a gene would result in Joyce D, the complete loss of protein production from the gene. 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. The entire polypeptide coding sequence of trpL is deleted.