Intron: sequencesplugin-autotooltip__default plugin-autotooltip_bigSequence: the precise order of monomers in a polymer. In DNA, it refers to the order of G, A, T, and C nucleotides. In RNA, it refers to the order of G, A, U, and C nucleotides. In proteins, it refers to the order of amino acids. in a pre-mRNAplugin-autotooltip__default plugin-autotooltip_bigpre-mRNA: In eukaryotes, genes are transcribed as a longer RNA molecule called pre-mRNA, which is then processed via splicing, 5'-capping, and 3' polyadenylation before it is transported into the cytoplasm and becomes a mature mRNA. that sit between exonsplugin-autotooltip__default plugin-autotooltip_bigExon: the portion of a pre-mRNA that contains codons. pre-mRNAs usually contain multiple exons that are interspersed with introns. Formally, exons are defined as a component of pre-mRNA, but the DNA sequence that codes for exons can also be informally referred to as exons. and are removed by splicingplugin-autotooltip__default plugin-autotooltip_bigIntron splicing: the act of remove introns and joining exons from pre-mRNA to form an mRNA. This occurs in the nucleus of eukaryotic cells and is catalyzed by an enzyme called the spliceosome.. Formally speaking, introns are defined as being part of pre-mRNAplugin-autotooltip__default plugin-autotooltip_bigpre-mRNA: In eukaryotes, genes are transcribed as a longer RNA molecule called pre-mRNA, which is then processed via splicing, 5'-capping, and 3' polyadenylation before it is transported into the cytoplasm and becomes a mature mRNA., but the DNAplugin-autotooltip__default plugin-autotooltip_bigDNA: deoxyribonucleic acid. The genetic material for nearly all life on Earth. sequenceplugin-autotooltip__default plugin-autotooltip_bigSequence: the precise order of monomers in a polymer. In DNA, it refers to the order of G, A, T, and C nucleotides. In RNA, it refers to the order of G, A, U, and C nucleotides. In proteins, it refers to the order of amino acids. that codes for introns can also be informally described as introns.