Question

Portion of gene, which is transcribed but not translated is?

• A. Exon
• B. Intron
• C. Cistron
• D. Codon

Answer 1

The correct option is B Intron

• The protein coding part of eukaryotic DNA is the exon while the gene sequences that are present between exons and do not code for any protein product are called introns.
• Each exon carries a part of the reading frame and thus carries information of a part of the encoded polypeptide, which means that it is both transcribed and translated.
• Introns of the transcript are removed by splicing to produce functional mRNA which means that introns are transcribed but not translated.

Thus, the correct answer is B.