Answer:
A. Glucose:
As lactose is absent will follow the glucose metabolism, so the lac repressor will hold tightly with the operator which leads to the prevention of transcription as RNA polymerase can not bind to promoter so no lactose metabolism.
B. lactose:
In the case or wild mutant lactose metabolism will occur as lactose is present, allolactose binds to the lac repressor thus the operator and promoter are free so transcription starts. The same result will be in all test except in the case of a mutant repressor.
C. glucose and lactose:
In this case, diauxic growth will occur. This growth takes place when two sugars are present in the media. The preferred sugar will be consumed first That is glucose. Then a lag phase will come which will be followed by the second sugar metabolism that is lactose. the given two cases :
Lactose will be metabolized first, as operator site mutation prevents repressor protein binding and thus will lead to the constitutive synthesis of lac operon in test B.
The same thing will happen, as in this case also, constitutive synthesis of lac operon will happen in test C.
Cultures grown in the presence of both glucose and lactose are metabolizing lactose. In the test (b) and (c) will be responsible due to constitutive synthesis of lac operon will happen.
The answer is Glucagon Increases. This works like this after
a meal of a rich carbohydrate, over four to six hours the blood glucose level
rise, leading to an increase in glycogen. Produced by alpha cells of the
pancreas and released in response to low blood glucose and epinephrine.
Secretion inhibited by high blood glucose and insulin. Stimulates glycogen
breakdown and inhibits glycogen synthesis
Answer:
It is called feedback regulation.
Explanation:
It is used when a product of the reaction is used for regulate the reaction. Therefore when there is enough product like ATP in this situtation, there is no need to run the reaction.
Mimicry. Mimicry the close resemblance of 1 plant or animal
to another for some purpose. mimicry is a similarity of one organism, usually
an animal, to another that has evolved because the resemblance is selectively
favoured by the behaviour of a shared signal receiver that can respond to
both.[1] Mimicry may evolve between different species, or between individuals
of the same species. Often, mimicry evolves to protect a species from
predators, making it an antipredator adaptation.[2] The resemblances that
evolve in mimicry can be in appearance, behaviour, sound or scent.
The correct answer is www.biojobs.net - www.higheredjobs.org - www.dnrjobs.gov. This is found by looking at the top level domain of the url (ex .com). Out of that list, net is least credible, org is 2nd most credible, and gov is most credible.
Hope this helps
