What is meant by post-transcriptional control?
Post-transcriptional regulation is the control of gene expression at the RNA level. It occurs once the RNA polymerase has been attached to the gene’s promoter and is synthesizing the nucleotide sequence.
Which is an example of post-transcriptional control of gene expression?
In Summary: Post-TransCRIPTIONAL Control of Gene Expression Post-transcriptional control can occur at any stage after transcription, including RNA splicing, nuclear shuttling, and RNA stability. Once RNA is transcribed, it must be processed to create a mature RNA that is ready to be translated.
What is transcriptional control in biology?
In molecular biology and genetics, transcriptional regulation is the means by which a cell regulates the conversion of DNA to RNA (transcription), thereby orchestrating gene activity.
What is transcriptional control and why is it important?
Transcriptional regulation is a critical biological process that allows the cell or an organism to respond to a variety of intra- and extra-cellular signals, to define cell identity during development, to maintain it throughout its lifetime, and to coordinate cellular activity.
What are some examples of post-transcriptional regulation?
RNA processing, such as splicing, capping, and poly-A tail addition. Messenger RNA (mRNA) translation and lifetime in the cytosol. Protein modifications, such as addition of chemical groups.
What are post-transcriptional and post-translational process?
Post-transcriptional mechanisms based on alternative splicing and RNA processing, as well as RNA silencing define the actual transcriptome supporting the cold stress response. Post-translational modifications such as ubiquitination and sumoylation regulate the activity of preexisting molecules.
Why is post-transcriptional processing important?
Without post-transcriptional processing, protein synthesis could be significantly slowed, since it would take longer for translation machinery to recognize RNA molecules and significantly more RNA would have to be unnecessarily translated to achieve the same results.
What is post-translational control of gene expression?
Post-translational control can be defined as the mechanisms by which protein structure can be altered after translation. Proteins are polymers of amino acids, and there are twenty different amino acids. Both the order and identity of these amino acids are important for the role that the protein plays in the cell.
What is post translational gene regulation?
Post-translational regulation refers to the control of the levels of active protein. There are several forms. It is performed either by means of reversible events (posttranslational modifications, such as phosphorylation or sequestration) or by means of irreversible events (proteolysis).
Which of the following is are involved in post-transcriptional control?
Which of the following are involved in post-transcriptional control? Answer d. All of the above (control of RNA splicing, RNA shuttling, and RNA stability) are involved in post-transcriptional control.
What is an example of post translational control?
Such post-translational modifications are generally reversible, one enzyme adds the modifying group and another can remove it. For example, proteins are phosphorylated by enzymes known as protein kinases, while protein phosphotases remove such phosphate groups.
What are post-transcriptional and post translational process?
What does the process of post translational control refers to quizlet?
Post translational control refers to: Regulation of gene expression after translation. Prokaryotic cells lack a nucleus. Therefore, the genes in prokaryotic cells are: Transcribed and translated almost simultaneously.
What are post-transcriptional factors?
Post-transcriptional factors include: RNA-binding proteins (RBPs), ribosomal proteins (RPs), micro-RNAs (miRNAs), and long non-coding RNAs (lncRNAs). Recent evidence that will be presented here suggests that these factors also play a crucial role in the generation of the neocortical layers.
Which of the following applies to post-translational control?
The description that best applies to post-translational control is: regulation of gene expression after translation.
Is post-translational control the fastest?
post-translational control. Because this mode involves modification of an already synthesized protein, it is the fastest in terms of regulating the activity of the gene product.