Cake recipes often say to line the baking pan with waxed paper or parchment, as if the two were interchangeable. As liners for cake pans they are, but in many other ways, they are not.
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For other uses, see Exon (disambiguation) . An exon is any part of a gene that codes for a part of the final mature RNA product of that gene after introns have been removed by RNA splicing. The term exon refers to both the DNA sequence within a gene and to the corresponding sequence in RNA transcripts.In RNA splicing, introns are removed and exons are covalently joined to one another as part of generating the mature messenger RNA.n exon is any part of a gene that codes for a part of the final mature RNA product of that gene after introns have been removed by RNA splicing.