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insens350 [35]
3 years ago
11

Digestive system immune response

Biology
1 answer:
jekas [21]3 years ago
6 0
<span>Your immune system must determine whether or not to develop a tolerance to everything you put into your mouth. Whenever you try a new food, it must decide, “Do I like this or do I attack and kill it?” You are always ingesting bacteria and other substances with your food, no matter how fresh and clean it is, so these must be screened out. While your immune system will “okay” most foods, genetic and other issues may affect its decision. Recent studies also suggest that your immune system’s ability to develop correct tolerances depends a great deal on the balance of good bacteria inside your intestinal tract</span>
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In which ways can the individual steps of this process be regulated to lead to higher or lower expression of a particular protei
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Answer:

There are many points at which eukaryotic gene expression can be controlled, through pretranscriptional control, transcriptional control, and posttranscriptional control

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The pretranscriptional control determines the accessibility of chromatin to the transcription machinery. It is affected by supercoiling and methylation. It is also known as epigenetic regulation, and it does not depend on the sequence but on the conformation of the DNA.

While transcriptional control determines the frequency and / or speed of transcription initiation through the accessibility of the start sites, the availability of transcription factors and the effectiveness of promoters.

The post-transcriptional control is the one that is exercised once the transcript has finished synthesizing. It can be of several types:

• Maturation control: As the RNA adjustment can be made.

• Transport control: Most RNA has to go out to the cytoplasm to perform its function. For this they have to cross the pores of the nuclear membrane, where you can select the RNAs that will be transported and those that will not.

• Stability control: The half-life of RNA can be regulated by the expression of RNAs or mRNA stabilizing proteins in the cytoplasm.

• Translational control: It is exercised on the frequency with which the mRNAs begin to be translated. It can also affect the frequency with which proteins mature and the availability of enzymatic effectors.

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3 years ago
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lara31 [8.8K]

Answer:

Produces, and Divides

Explanation:

Bacterial Reproduction is a single cell that divides into two identical daughter cells.

4 0
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How evolution starts- There is a mutation in the genes of one animal. If the mutation helps the animal, than the animal breeds and passes on this mutation. This is natural selection. Natural selection is the starting point of evolution because all of the helpful mutations get passed down to change the species over time for the animals' benefit.
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