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Is there any relation between the number of introns and exons in a gene?
Wiki User
∙ 12y ago
For one; there was a Time when there was no such thing as an intron, all genetic material was expressed. Having said that, as Time went by, the ratio of [expressed] exons to [suppressed] introns shrank.
Wiki User
∙ 12y ago
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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)
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?
What is the difference between an intron and exon?
Exons code for amino acids (they are usable codons) Introns code for nothing.
What are the introns and exons?
An intron is a DNA region within a gene that is not translated into protein. After intron splicing (ie. removal), the mRNA consists only of exon derived sequences, which are translated into a protein.
Mutations in introns are less likely to affect phenotype then mutation in exons?
mutation in exons are less likely to affect phenotype then mutation in introns because mutaion in exons are silent mutation
Are introns non-expressed?
Yes they are. Exons are expressed.
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.
Why do scientists think that introns and exons contribute to evolutionary flexibility?
many biologist think that this organization of genes add evolutionary felixablity . Each Econ protein adds a different part of a protein by having introns and Exons fellas can occasionally shuffle exons between genes and make new ones .
What are introns and extrons and how are they different?
Exon DNA encodes for the RNA included in the final mRNA transcript that encodes for proteins. Intron DNA is found within exons, but is spliced out as the mRNA molecule is processed.
Spliced together during mrna processing?
Exons, after the introns have been cleaved.
What the remaining pieces called that are spliced together?
Introns, exons
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.
