Protecting the mRNA while it travels from the nucleus to the ribosome.
5' cap helps protect mRNA from degradation by hydrolytic enzymes and after mRNA reaches the cytoplasm, the 5' cap functions as part of an "attach here" sign for ribosomes. The poly-A-tail inhibits degradation of RNA and helps ribosomes attach and facilitates export of mRNA from the nucleus.
They are involved in transporting the mRNA outside of the nucleus.
in the transition from pre-mRNA to mRNA, there are two major events that transform the polynucleotide chain. The first, is a modification of the ends, on the 5' end, there is a G cap added ( a g cap is derived from gtp), this g cap both helps the binding to ribosomes and protects against the break down by ribonuclease, to the 3' end a modification is made where by the AAUAAA sequence(which signals the cleaving enzyme)is cleaved off and replaced by a poly A sequence (100-200 nucleotides long), which assists in the transport of the mRNA out of the nucleous, and is vital to the polynucleotide's stability. The second modification is when the introns are removed, leaving just the exons.Hope this was helpful, -Brother of Captain Yitz
Before leaving the nucleus, the mRNA is modified (post-transcriptional modification). It is protected from ribonucleases by adding a 5' cap and a (3') poly A tail. These modifications help to stabilise the mRNA by preventing degradation by nucleases.
ANSWER: the small subunit of the ribosome recognizes and attaches to the 5' cap of mRNA ------------------------------------------------------------------------------------------------------- This answer bellow, appears all over the internet, but its wrong. I just took a quiz. -base pairing of activated methionine-tRNA to AUG of the messenger.
The 5' cap attached to the mRNA ensures the mRNA's stability while it undergoes translation.
No
5' cap helps protect mRNA from degradation by hydrolytic enzymes and after mRNA reaches the cytoplasm, the 5' cap functions as part of an "attach here" sign for ribosomes. The poly-A-tail inhibits degradation of RNA and helps ribosomes attach and facilitates export of mRNA from the nucleus.
5' cap and poly (A) tailPoly A tail at 3' end
They are involved in transporting the mRNA outside of the nucleus.
in the transition from pre-mRNA to mRNA, there are two major events that transform the polynucleotide chain. The first, is a modification of the ends, on the 5' end, there is a G cap added ( a g cap is derived from gtp), this g cap both helps the binding to ribosomes and protects against the break down by ribonuclease, to the 3' end a modification is made where by the AAUAAA sequence(which signals the cleaving enzyme)is cleaved off and replaced by a poly A sequence (100-200 nucleotides long), which assists in the transport of the mRNA out of the nucleous, and is vital to the polynucleotide's stability. The second modification is when the introns are removed, leaving just the exons.Hope this was helpful, -Brother of Captain Yitz
false
Before leaving the nucleus, the mRNA is modified (post-transcriptional modification). It is protected from ribonucleases by adding a 5' cap and a (3') poly A tail. These modifications help to stabilise the mRNA by preventing degradation by nucleases.
ANSWER: the small subunit of the ribosome recognizes and attaches to the 5' cap of mRNA ------------------------------------------------------------------------------------------------------- This answer bellow, appears all over the internet, but its wrong. I just took a quiz. -base pairing of activated methionine-tRNA to AUG of the messenger.
cap added, exons excised, and poly T tailed.
transcription is the act of DNA being 'transcribed' into mRNA inside the nucleus. Afterwards, the head and tail of the mRNA get capped with a poly-A tail and a 5 prime cap in RNA processing, so that the mRNA doesnt get recognizede as a dangerous molecule. There, it is then shipped of out of the nucleus where the mRNA gets translated into tRNA in the ribosome to produce amino acids which will eventually be turned into proteins
An eukaryotic mRNA has 2 ends, a 3' (three prime) end and a 5' (five prime) end. They are both protected from degradation. The 3' end is protecting by a long tail of the Adenosine base, this tail is reffered to as the Poly-A tail and is established through the process of polyadenylation. The 5' end has a different method of protection from degradation, it undergoes "capping". Capping involves a Gaunine base paring in a 5' - 5' manner with the exposed 5' end of the mRNA. This basically leaves no exposed 5'. An eukaryotic mRNA has 2 ends, a 3' (three prime) end and a 5' (five prime) end. They are both protected from degradation. The 3' end is protecting by a long tail of the Adenine base, this tail is reffered to as the Poly-A tail and is established through the process of polyadenylation. The 5' end has a different method of protection from degradation, it undergoes "capping". Capping involves a Gaunine base paring in a 5' - 5' manner with the exposed 5' end of the mRNA. This basically leaves no exposed 5'.