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Zarrin [17]
4 years ago
11

Gene expression in eukaryotes can be regulated at many different levels. List the different levels of regulation, and explain wh

at each means.
Biology
1 answer:
Aneli [31]4 years ago
4 0

Answer:

Transcription, mRNA (processing, transport, localization and stability), translation.

Explanation:

  • Transcription is regulated in two levels, though chromatin regulation (methylation and acetylation) to loose or increase histone's affinity to DNA and through cis and trans elements such as promoters, enhancers, and silencers (cis) to active/deactivate and RNA polymerase and transcription factors and co-factors (trans).
  • mRNA can be regulated using poly-A tails or 5'-caps to shorten or give them more time before they degrade, it could also be spliced to eliminate introns.
  • In the translation stage, the regulation occurs during the initiation through a scanning procedure that ensures the 40s ribosomal subunit bind correctly to the untranslated portion of RNA

Hope this information is useful to you!

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"Two haploid cells are formed" happens in meiosis during telophase I.

<u>Answer:</u> Option C

<u>Explanation:</u>

The chromosomes are inserted into nuclei during telophase I. The cell now needs to undergo a cytokinesis cycle, which separates the initial cell's cytoplasm into two daughter cells. One set of chromosomes are contained in each daughter cell and called as haploid or half the original cell's overall chromosomes number.

The parent cell has two poles, each with a full haploid set of chromosomes (consisting sister chromatids) when the meiotic process hits Telophase I. A cleavage furrow is formed at this point, splitting the cytoplasm of the cell into a half (cytokinesis). Once the cytoplasm is completely separated, the two originating daughter cells start planning for the second meiotic division.

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354/4561 and that is I think the answer

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<span>The autonomic nervous system

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3 years ago
A woman with a straight hairline has as child with a man who is heterozygous
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Answer:

aa

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A widow's peak is the dominant genotype so one must not have that trait. If it was presented then the woman would have the genotype.

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<h2>Answer is option "D"</h2>

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  • Chemostats have for some time been another supported stage for exploratory advancement, and were, truth be told, developed for this application. A chemostat is a development vessel into which a crisp medium is conveyed at a steady rate and cells and spent medium flood at that equivalent rate. In this way, the way of life is compelled to gap to stay aware of the weakening, and the framework exists in a steady-state where information sources coordinate yields
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