Asked by: Shaira Tietzschscience genetics
What is an exon in biology?
Last Updated: 20th January, 2020
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Also, what is an exon and intron?
Introns and exons are nucleotide sequences within a gene. Introns are removed by RNA splicing as RNA matures, meaning that they are not expressed in the final messenger RNA (mRNA) product, while exons go on to be covalently bonded to one another in order to create mature mRNA.
Secondly, what is an intron in biology? Definition. noun, plural: introns. (molecular biology) A noncoding, intervening sequence of DNA within a gene that is transcribed into mRNA but is removed from the primary gene transcript and rapidly degraded during maturation of the RNA product. Supplement. An intron is a nucleotide sequence within a gene.
Hereof, what is the function of Exon?
An exon is a coding region of a gene that contains the information required to encode a protein. In eukaryotes, genes are made up of coding exons interspersed with non-coding introns. These introns are then removed to make a functioning messenger RNA (mRNA) that can be translated into a protein.
Is an exon a codon?
Short answer: An exon is a part of a transcribed gene (from DNA) before the RNA has been subject to post-transcriptional modification (cf. intron). A codon is any three consecutive RNA nucleobases within a reading frame.