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Cell Biology


The DNA sequence in the nucleotides that defines a gene, actually includes some pieces that are part of the final product, and other pieces that are not. The useful pieces are called exons (executed regions). The pieces that are left out, being actually physically snipped right out of the line-up of nucleotides, are the introns. The term intron means “intergenic region” (within the region of a gene but not actually of the gene).

The need to exclude introns from a finished piece of mRNA reveals how complex is the process of translation in the cell. The whole idea is also connected to another elaborate process, alternative splicing. Such fancy elaborations of an already complicated process are clear testimony to purpose and planning in cell design by God, the Creator.

Related Terms

  • Spliceosome
  • Alternative Splicing
  • Amino Acid and Proteins
  • RNA (Ribonucleic Acid)