Exons
Eukaryotics are split up into parts that are expressed as RNA products and parts that are not; also known as exons.
Exons appear in short sequences spread out within the gene, but will still be present until the final mature RNA is created
(after introns have been removed. They are covalently joined to one another during RNA splicing. Exons are part of what is expressed through transcription and translation. Known as the "meat" of the gene. The exons consider coding areas that specify our proteins.
Exonization is the creation an a new exon which results in mutated intronic sequences.
Exons appear in short sequences spread out within the gene, but will still be present until the final mature RNA is created
(after introns have been removed. They are covalently joined to one another during RNA splicing. Exons are part of what is expressed through transcription and translation. Known as the "meat" of the gene. The exons consider coding areas that specify our proteins.
Exonization is the creation an a new exon which results in mutated intronic sequences.
Introns
In between exons lie other pieces known as introns. Introns are made of intertwining sequences removed from a gene before RNA product is made. Introns are commonly found in genes of MOST organisms and many viruses - they display a wide range of genes such as proteins, ribosomal RNA, and transfer RNA. Introns are usually the non-coding region since they do not seem to code for any proteins or enzymes. Four classes of introns have been discovered: introns in nuclear protein-coding genes, introns in archaeal RNA, self splicing group I, and group II removed by RNA catalysis. Scientists are still researching its significance.
Introns and Exons. Digital image. McGraw-Hill Online Learning Center Test. The McGraw-Hill Companies, Inc., n.d. Web. 2 May 2015.