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Why are introns copied and then removed from the RNA sequence?
Wiki User
∙ 10y ago
Introns were copied and then removed from the RNA sequence because they were placeholders.
Wiki User
∙ 10y ago
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What is the role of introns in gene regulation?
Introns are removed through RNA splicing. They don't play a role.
What are internal non coding regions of RNA called?
Internal noncoding regions of RNA are called introns. They are segments of an RNA molecule that interrupt the sequence of genes.
How is RNA altered after it is transcribed?
poly-A tail 7-methylguanine cap introns being removed (splicing)
What is the small pieces of DNA that are edited out of the mRNA message before it is expressed?
During the transcription, when the mRNA is being processed, the introns are removed and the exons are connected together.
What portions of RNA cut out and discard?
Introns
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 are exons and introns?
Intronsare intervening sequence of DNA; does NOT code for a protein.Exons are expressed squence of DNA; codes for a protein.
What is the role of introns in gene regulation?
Introns are removed through RNA splicing. They don't play a role.
Why must introns be removed while the exons remain in the mRNA?
Introns are non-translated sections of a gene, i.e. they are not made into protein. The gene is stored in the chromosomes as DNA. When the corresponding protein is needed, the DNA is copied (transcribed) by RNA polymerase making a complementary copy of the gene made of RNA. This is then processed to remove the introns (the non-coding parts of the gene). It was long thought these introns hasdno use. However, there is evidence that they have a role in the processing of the RNA. In addition, introns allow more than one protein to be produced from a single gene. The RNA with the introns removed is now the messenger RNA (mRNA) which is transported out of the nucleus into the cytoplasm, where it is read by the ribosome, which produces the coded protein. See http://en.wikipedia.org/wiki/Intron
What are the intervening sequence of RNA molecules that are cut out before the messenger RNA leaves the nucleus?
Introns are cut out and then the exons are spliced together.
Sections of RNA molecules that are removed before eukaryotic gene becomes functional?
introns
What part of an RNA strand is removed after it is transcribed from DNA?
the introns, rbr, prmoter region,
What determines how many amino acids is in a polypeptide?
When a gene is transcribed there is a sequence of RNA bases that was copied from the DNA sequence. The RNA sequence can be exactly the same as the DNA or can be modified more in higher organisms by removing the introns if any. Three RNA bases is a codon. Each codon signifies an amino acid. There is an initiation codon and a terminal codon. So the amino acid sequence is determined by the sequence (multiple of 3 RNA bases) of codons between the initiation codon and termination codon.
What are internal non coding regions of RNA called?
Internal noncoding regions of RNA are called introns. They are segments of an RNA molecule that interrupt the sequence of genes.
How is RNA altered after it is transcribed?
poly-A tail 7-methylguanine cap introns being removed (splicing)
What is the small pieces of DNA that are edited out of the mRNA message before it is expressed?
During the transcription, when the mRNA is being processed, the introns are removed and the exons are connected together.
What is an exon?
When a gene is transcribed to for an mRNA molecule, introns are removed and exons stay to be reattached to from one linear mRNA molecule again. This final RNA sequence then gets used by a Ribosome to form a protein
