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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 else can I help you with?
Are exons or introns removed during the process of splicing?
Exons are the parts of a gene that are kept and expressed, while introns are the parts that are removed during the process of splicing.
In eukaryotes only exons are translated?
Correct. The mRNA transcibed from the DNA in the nucleus has both exons and introns; the introns are taken out and the exons are left in. The mended exons exit the nucleus and the introns stay in the nucleus. Only the exons are translated at the ribosomes. (In Eukaryotic cells only)
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 happens to the introns and exons during transcription?
After transcription, the mRNA is processed by the spliceosome, which splices out the introns (because introns are not part of the coding sequences for protein), and "stitches" the exons together to form the final transcript that is sent to the ribosome for translation.
What is the difference between an intron and exon?
Introns are non-coding segments of DNA that are removed during RNA processing, while exons are coding regions that are spliced together to form the final mRNA transcript. Exons contain the information needed to produce proteins, while introns do not.
Are exons or introns removed during the process of splicing?
Exons are the parts of a gene that are kept and expressed, while introns are the parts that are removed during the process of splicing.
What portion of an eukaryotic gene is not spliced out?
In a eukaryotic gene, the portion that is not spliced out is the exons. Exons are the coding sequences that remain in the mature mRNA after the introns, which are non-coding regions, have been removed during the splicing process. These exons are then translated into proteins, while the introns are discarded.
In eukaryotes only exons are translated?
Correct. The mRNA transcibed from the DNA in the nucleus has both exons and introns; the introns are taken out and the exons are left in. The mended exons exit the nucleus and the introns stay in the nucleus. Only the exons are translated at the ribosomes. (In Eukaryotic cells only)
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 happens to the introns and exons during transcription?
After transcription, the mRNA is processed by the spliceosome, which splices out the introns (because introns are not part of the coding sequences for protein), and "stitches" the exons together to form the final transcript that is sent to the ribosome for translation.
What is the difference between an intron and exon?
Introns are non-coding segments of DNA that are removed during RNA processing, while exons are coding regions that are spliced together to form the final mRNA transcript. Exons contain the information needed to produce proteins, while introns do not.
Are exons or introns spliced out during the process of RNA splicing?
During the process of RNA splicing, introns are spliced out, while exons are joined together to form the mature mRNA molecule.
What are introns and extrons and how are they different?
Introns are non-coding sequences within a gene that are transcribed but are later removed during RNA processing. Exons are the coding regions of a gene that are spliced together after introns are removed to form the mature mRNA transcript. This process is known as RNA splicing and is essential for producing functional proteins from genes.
What are the pieces of a split gene called in eukaryotes?
exons - good parts of gene that code for amino acids introns- "junk DNA" that do not code for amino acids of a protein ( before leaving the nucles mRNA must have these removed, then it can travel into the cytoplasm)
What is the Mrna sequence?
Eukaryotic genes have regions called "introns" and "exons". Exons code for polypeptides (often specific domains or motifs), while introns don't code for anything (that we know of) and are removed. mRNA splicing is the process where an mRNA molecule is cut up (usually by the "spliceosome") to remove the introns from an mRNA message. This is advantageous for us eukaryotes because we can recombine exons in different orders, and even combine exons from different genes to generate many proteins from a smaller number of genes.
What is the difference between exons and introns?
Exons are the DNA sequences that code for proteins. Introns are involved however they dont carry the genetic information that exons carry, the variation provides for revolutionary flexibility allowing cells to shuffle exons between genes to make new ones. A great way to remember which is which is Exons (sounds like Executives, like in a business) have the information and introns (sounds like the interns of a business) dont know anything; exons and inrons, executives and interns. Easy huh?
How many introns are in CFTR?
The CFTR gene has 27 exons and 26 introns. Introns are non-coding sequences that are spliced out during mRNA processing, while exons are coding sequences that are retained in the final mRNA transcript.
