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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.
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The 3' poly-a tail is attached to?
mRNA
Sequence the steps of transcription and RNA processing by dragging the labels to their correct locations in the flowchart?
a. transcription is initiated b. 5' cap is added c. introns are removed d. transcription is terminated e. 3' poly-A tail is added f. mRNA exists nucleus
How is mRNA stabilized before leaving the nucleus for translation?
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.
What protects mRNA from attack by cellular enzymes?
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'.
How does pre mRNA become mRNA?
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
What helps to stabilize mRNA by inhibiting its degradation?
5' cap and poly (A) tailPoly A tail at 3' end
The 3' poly-a tail is attached to?
mRNA
What are post-transcriptional modifications occurring in eukaryotic mRNAs?
The 5' end receives a modified nucleotide 5' cap The 3' end gets a poly-A tail
Why does not prokaryotic mRNA have 5' cap 3' tail?
No
Sequence the steps of transcription and RNA processing by dragging the labels to their correct locations in the flowchart?
a. transcription is initiated b. 5' cap is added c. introns are removed d. transcription is terminated e. 3' poly-A tail is added f. mRNA exists nucleus
How is mRNA stabilized before leaving the nucleus for translation?
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.
What protects mRNA from attack by cellular enzymes?
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'.
How does pre mRNA become mRNA?
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
What are two ways that messenger RNA is processed prior to translation?
Not necessarily in this order: It gets a 5' modified guanine cap It gets a 3' poly-A tail It visits a spliceosome. The introns are removed. The exons may undergo "alternative splicing" in which some of them are removed too, and the rest are spliced together to make one mRNA.
When was Poly Styrene born?
Poly Styrene was born on July 3, 1957, in Bromley, Kent, England, UK.
What are 3 problems caused by a peacocks large tail?
Three problems caused by a peacock's large tail include slows down the male, serves no useful purpose and makes him conspicuous to predators.
The mascot of cal poly pomona?
Mustangs!:3
