What are introns and exons? Discuss the evolution of proteins by exon

Question

What are introns and exons? Discuss the evolution of proteins by exon shuffling with illustrations.

22 Aug 2024

Answer :

Word Count : 626

Introns and Exons

Introns and exons are components of a gene, which is a segment of DNA that codes for a specific protein. In eukaryotic cells, genes are typically composed of both exons, which are coding regions, and introns, which are non-coding regions.

Exons are the sequences in the DNA that are transcribed into mRNA and eventually translated into proteins. They contain the actual code that determines the sequence of amino acids in a protein.

Introns, on the other hand, are sequences found within genes that are transcribed into mRNA but are not translated into protein. These sequences are removed or "spliced out" from the mRNA molecule during the process of RNA splicing, leaving only the exons to be translated into a protein. The presence of introns and exons is a significant feature of eukaryotic genes, and their organization can have important implications for gene expression and evolution.

Exon Shuffling and Protein Evolution

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