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Eukaryotic genes have regions called "introns" and "exons". Exons code for polypeptides (often specific domains or motifs), while introns don't code for anything (that we know of) and are removed.
mRNA splicing is the process where an mRNA molecule is cut up (usually by the "spliceosome") to remove the introns from an mRNA message. This is advantageous for us eukaryotes because we can recombine exons in different orders, and even combine exons from different genes to generate many proteins from a smaller number of genes.
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Are introns or exons removed during the process of mRNA splicing?
Exons are the parts of the mRNA that are kept and introns are the parts that are removed during the process of mRNA splicing.
Does splicing occur in prokaryotes?
Yes, splicing does occur in prokaryotes. In prokaryotes, the process is known as group II intron splicing, which involves the removal of introns from RNA transcripts without the involvement of spliceosomes. Group II introns self-splice by forming a lariat structure and catalyzing their own removal from the RNA sequence.
How do introns and exons relate to RNA splicing?
Before the RNA leaves the nucleus, the introns are removed and the exons are joined together, producing an mRNA molecule with a continuous coding sequence. This process is called RNA splicing.
What happens to introns in eukaryotic mRNA during the process of splicing?
During the process of splicing in eukaryotic mRNA, introns are removed. This leaves only the exons, which are the coding regions, to be joined together to form the final mRNA molecule that will be translated into a protein.
What occurs after transcription to produce the new protein molecule?
After transcription, the pre-mRNA undergoes splicing to remove introns and join exons to form mature mRNA. The mature mRNA then leaves the nucleus and binds to a ribosome in the cytoplasm for translation. During translation, the ribosome reads the mRNA codons and synthesizes a protein by linking amino acids together in the correct sequence.
Are introns or exons removed during the process of mRNA splicing?
Exons are the parts of the mRNA that are kept and introns are the parts that are removed during the process of mRNA splicing.
Does splicing occur in prokaryotes?
Yes, splicing does occur in prokaryotes. In prokaryotes, the process is known as group II intron splicing, which involves the removal of introns from RNA transcripts without the involvement of spliceosomes. Group II introns self-splice by forming a lariat structure and catalyzing their own removal from the RNA sequence.
How do introns and exons relate to RNA splicing?
Before the RNA leaves the nucleus, the introns are removed and the exons are joined together, producing an mRNA molecule with a continuous coding sequence. This process is called RNA splicing.
What happens to introns in eukaryotic mRNA during the process of splicing?
During the process of splicing in eukaryotic mRNA, introns are removed. This leaves only the exons, which are the coding regions, to be joined together to form the final mRNA molecule that will be translated into a protein.
What mechanisms of gene regulation operates after mRNA transcription but before translation of mRNA into protein?
There are two mechanisms as related to above. Firstly, the removal of All Introns occurs - via the Spliceosome -, and then a "poly AAAAAAA" tail is attached to the [edited] mRna transcript just before its export to the cytoplasmic Ribosomes.
DNA sequence acgtt will give what mRNA base sequence?
The mRNA base sequence corresponding to the DNA sequence acgtt is ugcaa. The mRNA sequence is complementary to the DNA sequence, with thymine (T) in DNA being replaced by uracil (U) in mRNA.
What occurs after transcription to produce the new protein molecule?
After transcription, the pre-mRNA undergoes splicing to remove introns and join exons to form mature mRNA. The mature mRNA then leaves the nucleus and binds to a ribosome in the cytoplasm for translation. During translation, the ribosome reads the mRNA codons and synthesizes a protein by linking amino acids together in the correct sequence.
Difference between protein splicing and RNA splicing?
Protein splicing involves the excision of intervening peptide sequences called inteins from a precursor protein to produce the final functional protein, while RNA splicing involves removing introns and joining exons in pre-mRNA to form mature mRNA. Protein splicing occurs post-translationally in the protein after translation, while RNA splicing occurs co-transcriptionally during mRNA processing.
What happens before messenger RNA is mature?
Before messenger RNA (mRNA) is mature, it undergoes several post-transcriptional modifications. These modifications include capping, splicing, and polyadenylation. Capping involves adding a modified guanine nucleotide at the 5' end, splicing removes introns to create a mature mRNA sequence, and polyadenylation adds a poly-A tail at the 3' end.
Does mRNA contain thymine in its nucleotide sequence?
No, mRNA does not contain thymine in its nucleotide sequence. Instead, mRNA contains uracil in place of thymine.
What is the primary transcript of eukaryotic genes?
the primary transcript usually has a exons and introns which need to undergo splicing to remove the introns and re-splicing to join the exons ..after this process the resulting mRNA is a mature mRNA.
How many reading frames are possible for a sequence of mRNA?
There are three possible reading frames for a sequence of mRNA.
