What is the difference between exons and introns

We can also say that exons are coding areas, whereas, introns are non-coding areas. Both Roberts and Phillip Sharp discovered Introns and exons respectively. The introns change their sequences frequently with time, whereas the exon sequences are highly conserved. Some of the important difference between introns and exons are the following:. Found in Eukaryotes only.

Found in both prokaryotes and eukaryotes. Non-coding areas of the DNA. Coding areas of the DNA. Introns are the transcribed part of the nucleotide sequence in an mRNA and bound to carry the non-coding part for the proteins. The sequence of the introns frequently changes over time. Introns and exons are parts of eukaryotic genes. Exons are interspersed with introns in most eukaryotic genes. This includes both exons and introns. Next, during the process of RNA splicing, introns are removed and exons are joined together to form a complete coding sequence.

This mature mRNA is ready for translation. During mRNA processing, introns are removed from the mRNA primary transcript, producing a mature mRNA, which leaves the nucleus in the cytoplasm in order to be translated into an amino acid sequence. The main difference between introns and exons is that introns stay inside the nucleus, keeping the DNA safe in the genes whereas exons leave the nucleus in order to be translated into a protein. What are Introns — Definition, Characteristics, Function 2.

What are Exons — Definition, Characteristics, Function 3. What is the difference between Introns and Exons. Introns are found in both intergenic regions of the gene and mRNA primary transcript. Therefore, removal by RNA splicing within the nucleus is a universal feature in introns. Hence, mature RNA lack introns. On the other hand, prokaryotes lack RNA splicing mechanisms.

Therefore, specific regions like exons and introns cannot be identified in prokaryotes. Introns can be classified into four major classes: spliceosomal introns, tRNA introns, group I introns and group II introns. Spliceosomal introns are found in the protein-coding genes, removed by spliceosomes.

The biological function of introns is not clearly known. Alternative splicing of introns promotes the production of a wide variety of proteins from a single mRNA primary transcript. They are responsible for protein synthesis Within a gene. Sometimes the non-coding regions interrupt the coding regions.

In this article, we will understand the key terms exons, introns, and the difference between exons and introns. The main difference between exons and introns is that exons require information or codons for the synthesis of proteins and are sequences of DNA that code protein, whereas Introns are sequences of DNA that do not code and are separated during RNA maturation through the process of splicing of RNA.

Exons code different types of proteins by different sequences that are formed via different configurations by the process of combination of exons. It is a part of a gene that encodes one or more parts of the produced mature RNA after the removal of introns by the process of RNA splicing.

Introns are the nucleotide sequences that are removed by the process of splicing of RNA when the final product of the RNA matures. An intragenic region within a gene is well described as an intron. Introns have the capability of converting into novel genes throughout the evolutionary process of the non-coding short regions that convert into real functional genes.

The DNA sequences that code protein are called Exons. However, they require some information or the codons that are necessary for the synthesis of proteins. The region that ks expressed in the genome is termed as an exon. In eukaryotic organisms, the exons that code are separated by the introns.

The exosome is the total sets of exons that are present in the genome of an organism.