Part of gene that is transcribed but NOT translated is __________.

Step-by-step solution

In eukaryotes, the structural gene is split into coding sequences called exons and non-coding intervening sequences called introns. During transcription, both exons and introns are transcribed to form the primary transcript (hnRNA). During post-transcriptional modification (splicing), the introns are removed and the exons are joined together to form mature mRNA. The mature mRNA is then translated into a protein. Therefore, introns are the parts of a gene that are transcribed but not translated. Answer: intron