How is transcription controlled in eukaryotes?
How is transcription controlled in eukaryotes?
As in bacteria, transcription in eukaryotic cells is controlled by proteins that bind to specific regulatory sequences and modulate the activity of RNA polymerase. …
What is eukaryotic transcriptional control?
Transcriptional control is the primary means of regulating gene expression in eukaryotes, as it is in bacteria. In eukaryotic genomes, cis-acting control elements that regulate transcription from a promoter often are located many kilobases away from the start site.
What are the stages of transcriptional control?
First, transcription is controlled by limiting the amount of mRNA that is produced from a particular gene. The second level of control is through post-transcriptional events that regulate the translation of mRNA into proteins. Even after a protein is made, post-translational modifications can affect its activity.
Does transcriptional control occur in prokaryotes?
The regulation of gene expression in prokaryotic cells occurs at the transcriptional level. There are two majors kinds of proteins that control prokaryotic transcription: repressors and activators.
Which step in translation is significantly difference between eukaryotes and bacteria?
Translation has three main stages: initiation, elongation, and termination. These differ slightly in prokaryotic and eukaryotic organisms: in prokaryotes, translation occurs in the cytoplasm, while in eukaryotes, translation takes place in the endoplasmic reticulum.
What are two ways in which eukaryotic cells regulate gene expression?
Eukaryotic gene expression is regulated during transcription and RNA processing, which take place in the nucleus, and during protein translation, which takes place in the cytoplasm. Further regulation may occur through post-translational modifications of proteins.
What is the example of post-transcriptional modification?
There are many types of post-transcriptional modifications achieved through a diverse class of molecular mechanisms. One example is the conversion of precursor messenger RNA transcripts into mature messenger RNA that is subsequently capable of being translated into protein.
Why is transcriptional control important in prokaryotes?
Prokaryotic organisms are single-celled organisms that lack a cell nucleus, and their DNA therefore floats freely in the cell cytoplasm. As a result, the primary method to control what type of protein and how much of each protein is expressed in a prokaryotic cell is the regulation of DNA transcription.
Is translation the same in prokaryotes and eukaryotes?
Translation is a universal process occurs in both prokaryotes and eukaryotes. The fundamental process of translation is same in prokaryotes and eukaryotes. Members of both groups uses information present in mRNA, which is came from the DNA by transcription, to synthesize proteins with ribosome as the machinery.
What is the difference in translation initiation between prokaryotes and eukaryotes?
Eukaryotic and Prokaryotic translations are involved in protein synthesis….Difference Between Prokaryotic And Eukaryotic Translation.
| Prokaryotic Translation | Eukaryotic Translation |
|---|---|
| Cap initiation | |
| Cap-independent | Cap-dependent and Cap-independent |
| Performed by | |
| 70S ribosomes | 80S ribosomes |