Respuesta :
Answer:
5' UTR E1 E2 E3 E4 UTR 3'
Explanation:
During RNA splicing, introns are removed and exons are joined tp each other to form a mature mRNA and this RNA moves to cytosol.. So 5' UTR , UTR 3' and all exons are joined together.
All introns are removed and exons are joind during RNA splicing process.
So the final mRNA is 5' UTR E1 E2 E3 E4 UTR 3'.
Introns are non-encoding sequences, while exons are the encoding sequences. Before leaving the nucleus, introns are removed from mRNA. Only exons compose the mRNA in the cytosol. 5' - UTR E1 E2 E3 E4 UTR - 3'.
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Introns are non-encoding sequences that produce interruptions in a eukaryotic gene.
On the contrary, the encoding sequences are called exons.
Most of the eukaryotic, multicellular genes contain introns in their sequences.
Introns are transcripted to mRNA molecules and get excised before translation by a specific mechanism.
This occurs before the mRNA leaves the nucleus. The introns are excised, and the exons must splice to form a unique molecule. This process is known as splicing.
Now that we have already made a review let us analyze the given sequence,
5' - UTR E1 I1 E2 I2 E3 I3 E4 UTR - 3'
We know that mRNA has both introns and exons before leaving the nucleus. But in the cytosol, this molecule only has exons since introns are excised before leaving the nucleus.
So what we need to do is to remove introns from the given sequence,
- with introns ⇒ 5' - UTR E1 I1 E2 I2 E3 I3 E4 UTR - 3' ⇒ Nucleus
- with no introns ⇒ 5' - UTR E1 E2 E3 E4 UTR - 3' ⇒ Cytosol
So, the components of the molecule that will also be found in mRNA in the cytosol are exons ⇒ 5' - UTR E1 E2 E3 E4 UTR - 3'
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