Non Coding sequences called ____ are removed from the primary transcript after the cap and tail are added.

Non Coding sequences called ____ are removed from the primary transcript after the cap and tail are added.

• A. Exons
• B. Promoters
• C. Introns
• D. Enhancers

Answer: (C)

In eukaryotic RNA processing, the initial transcript contains both coding and non-coding parts. After the 5' cap and the 3' poly-A tail are added, the non-coding segments are removed by splicing. These non-coding pieces are introns, and they’re cut out so the remaining coding segments, exons, are joined together to form mature mRNA that will be translated. Exons stay in the message, promoters and enhancers are DNA elements that regulate transcription and aren’t part of the final mRNA.

In eukaryotic RNA processing, the initial transcript contains both coding and non-coding parts. After the 5' cap and the 3' poly-A tail are added, the non-coding segments are removed by splicing. These non-coding pieces are introns, and they’re cut out so the remaining coding segments, exons, are joined together to form mature mRNA that will be translated. Exons stay in the message, promoters and enhancers are DNA elements that regulate transcription and aren’t part of the final mRNA.