The answer is A The amino acid inactivates the repressor
Answer:
A gene is a stretch of DNA or RNA that determines a certain trait. Genes mutate and can take two or more alternative forms; an allele is one of these forms of a gene. For example, the gene for eye color has several variations (alleles) such as an allele for blue eye color or an allele for brown eyes.
Explanation:
Bright cherry red color is produced upon the addition of methyl red indicator to a culture of a Gram negative bacilli in MR-VP broth if the organism used the mixed acid pathway of fermentation.
What is MR-VP test?
- As part of the IMViC testing, Methyl Red (MR) and Voges-Proskauer (VP) broth is utilized as the medium in which both the Methyl Red and Voges-Prosakuer tests can be conducted.
- It is a straightforward broth made up of dextrose or glucose, buffers, and peptone.
- In the Methyl Red test, an infected tube of MR-VP broth is mixed with the pH indicator methyl red.
- The acids will overwhelm the buffers in the medium and create an acidic environment if the organism employs the mixed acid fermentation pathway and creates stable acidic end products.
- If acidic end products are present when methyl red is introduced, the methyl red will remain red.
Learn more about the MR-VP test with the help of the given link:
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<span>I usually think of biology first, and then physics. I trust those types of science a whole lot more than social sciences. I don't think of it like most non-sciency people do (like with diet pills and perfume). I think of it like using the actual scientific method, doing the same thing over and again expecting different results, taking the objective (or subjective, when that applies) results and forming a logical conclusion and not one that fits your hypothesis/agenda. Kind of like those kids that every high school has (on TV shows, they're the ones that are doing something with robotics all the time) that are nerdy, science geeks always running experiments and seeing what happens. </span>
It would be D because would be small and you wouldn't feel it. For answer A, the scientist could feel it. For answer B, you can kind of feel it or feel it. For C, It can definitely feel it. So the answer would be d.
