Consider the regulation of the lac operon in E. coli. What do you predict the phenotype of a “super-repressor” mutant or lacI S, which is always active, whether or not the inducer is present would be? The Phenotype of a “Super-Repressor” Mutant or lacI S in E. coli

A Phenotype for a Super-Repressor Mutant (or lacI S) in E. coli

E. coli has three genes that make up the lac operon. They are lacZY, lacY, or lacA. The transcriptional repressor protein, lacI, regulates them all. This protein binds with the operon’s operator region and prevents transcription if the inducer has not been present. The organism’s phenotype would differ if a lacI S mutant (super-repressor) is present. The lac operon would be completely suppressed if the inducer was absent. This would mean that the organism could not synthesise the enzymes required to metabolise lactose. Therefore, lactose wouldn’t be used as a carbon source. The laboratory has shown this phenotype with E.coli strains containing the lacI S gene, which showed a significantly lower lactose usage than wild-type E.coli (Dalton and al., 2019,).
In the absence of an inducer, the lac operon will remain suppressed, so organisms won’t be able synthesise enzymes to metabolise it. Cont…

Place your order
(550 words)

Approximate price: $22

Calculate the price of your order

550 words
We'll send you the first draft for approval by September 11, 2018 at 10:52 AM
Total price:
$26
The price is based on these factors:
Academic level
Number of pages
Urgency
Basic features
  • Free title page and bibliography
  • Unlimited revisions
  • Plagiarism-free guarantee
  • Money-back guarantee
  • 24/7 support
On-demand options
  • Writer’s samples
  • Part-by-part delivery
  • Overnight delivery
  • Copies of used sources
  • Expert Proofreading
Paper format
  • 275 words per page
  • 12 pt Arial/Times New Roman
  • Double line spacing
  • Any citation style (APA, MLA, Chicago/Turabian, Harvard)

Our guarantees

Delivering a high-quality product at a reasonable price is not enough anymore.
That’s why we have developed 5 beneficial guarantees that will make your experience with our service enjoyable, easy, and safe.

Money-back guarantee

You have to be 100% sure of the quality of your product to give a money-back guarantee. This describes us perfectly. Make sure that this guarantee is totally transparent.

Read more

Zero-plagiarism guarantee

Each paper is composed from scratch, according to your instructions. It is then checked by our plagiarism-detection software. There is no gap where plagiarism could squeeze in.

Read more

Free-revision policy

Thanks to our free revisions, there is no way for you to be unsatisfied. We will work on your paper until you are completely happy with the result.

Read more

Privacy policy

Your email is safe, as we store it according to international data protection rules. Your bank details are secure, as we use only reliable payment systems.

Read more

Fair-cooperation guarantee

By sending us your money, you buy the service we provide. Check out our terms and conditions if you prefer business talks to be laid out in official language.

Read more