Exon
Definition
An exon is a segment of DNA or RNA molecule containing information coding for a protein or peptide sequence.
Analogy
Think of an exon as the chapters in a book. Each chapter (exon) contains important information (codes for proteins) that contributes to the overall story (the functioning of an organism).
Related terms
Intron: These are non-coding sections of an RNA molecule that are removed before the RNA is translated into protein.
Coding Sequence: This is the portion of a gene's DNA or RNA, composed of exons, that codes for protein.
Genome: The complete set of genes or genetic material present in a cell or organism.
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