Question

p O words Question 54 10 pts List and describe four mechanisms used during eukaryotic regulation of gene expression that are NOT found in prokaryotes. 12pt v Paragraph | BI U A e Tv p PAGO O words Question 55 10 pt: st and describe all the major players involved in transcription of the lac operon in bacteria while entioning how they work together to optimze expression of the genes. As part of your answer, provide tails of the scenario in which you would expect to find maximal expression of the lac operon genes. MacBook Pro 000

Answer 1

There are 5 levels of regulation in eukaryotes -

1. Transcriptional regulation

2. Post transcriptional/RNA processing (exclusive to eukaryotes)

3. mRNA transport from nucleus to cytoplasm (exclusive to eukaryotes)

4. Translation

5. Post translational modification

During post-transcriptional gene regulation, premature messenger RNA is process ed to form mature messenger RNA. In this process, all the introns are removed and all the exons are joined together. Introns are absent in prokaryotes or RNA processing does not take place in them. This is called a splicing. Apart from the removal of introns, capping at 5' end and tailing at 3' end also takes place in mRNA.

During the transport of messenger RNA from nucleus to cytoplasm, it is protected by the action of cytoplasmic nucleases from degradation food stop because nucleus is absent in prokaryotes, this step does not occur in them.

Please give a good rating