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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
Wiki User
∙ 11y ago
Wiki User
∙ 14y agoA 5' cap and a 3' poly-A tail must be added. Then the pre-mRNA must be spliced. After this it is called mRNA and is ready to be transported to the cytoplasm for translation.
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What is Heterogeneous nuclear DNA?
Pre-mRNA. It is the mRNA that is synthesized in the nucleus of eukaryotes. After being synthesized, this mRNA is processed, so that introns, noncoding, DNA is removed.
What is removed from pre-mRNA during RNA processing?
noncoding
Which correctly lists the changes to eukaryotic pre mRNA to form mRnA?
cap added, exons excised, and poly T tailed.
What are the sense portions of a pre-mRNA strand made in transcription called?
Exons
What are non-coding sequences in pre-mRNA called?
I dont even know -.-
What is the order of how a cell changes DNA messages to protein?
DNA -> transcription -> pre-mRNA -> mRNA processing -> mRNA -> translation -> protein
In what part of the cell will the pre-mRNA be edited?
Transcription. This process is when the mRNA is made, edited, then sent out to be translated.
Introns in pre-mRNA are known to?
Undergo Excision
What is Heterogeneous nuclear DNA?
Pre-mRNA. It is the mRNA that is synthesized in the nucleus of eukaryotes. After being synthesized, this mRNA is processed, so that introns, noncoding, DNA is removed.
What is removed from pre-mRNA during RNA processing?
noncoding
Which correctly lists the changes to eukaryotic pre mRNA to form mRnA?
cap added, exons excised, and poly T tailed.
Which section of the pre-mRNA contains the protein coding regions?
intron
What are the sense portions of a pre-mRNA strand made in transcription called?
Exons
What are non-coding sequences in pre-mRNA called?
I dont even know -.-
MRNA migrates from its site of synthesis and becomes attached to?
From the nucleus where it is synthesized, the mRNA passes into the cytoplasm and become attached to ribosomes.
What makes premature mrna and mature mrna different?
The first (primary) transcript from a protein coding gene is often called a pre-mRNA and contains both introns and exons. Pre-mRNA requires splicing (removal) of introns to produce the final mRNA molecule containing only exons
What is the molecule transcribed from DNA called?
initially its hrRNA or pre-mRNA. (same thing different name). this then undergoes some modification like splicing, capping and polyadenalation to make mRNA which is then translated into protein.
