the coding sequences or expressed sequences in a transcription unit are defined as exons . These are the specific sequences that appear in mature or processed RNA after the non-coding intervening sequences, known as introns, have been removed during splicing . Following the Central Dogma, these exons in the mRNA provide the template for translation, where the sequence of bases dictates the polymerisation of amino acids to form a polypeptide, or protein . Understanding the structure and function of exons is a high-priority strategy for medical aspirants, as NCERT textbooks serve as the primary resource for approximately 95% of NEET Biology questions .