In eukaryotic genes, noncoding sequences that are removed from the transcript before translation are called:

In eukaryotic genes, noncoding sequences that are removed from the transcript before translation are called:

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

Answer: (A)

Noncoding segments that are removed from the transcript before translation are introns. After a gene is transcribed, the initial RNA product (pre-mRNA) contains both introns and exons. The introns are cut out and the remaining exons are spliced together to form mature mRNA, which then serves as the blueprint for protein synthesis. Exons are the coding parts that stay in the final mRNA. Promoters are DNA regions that help start transcription by recruiting RNA polymerase, and enhancers are regulatory elements that boost transcription levels. So introns are the correct term because they are the noncoding pieces removed during RNA processing before translation.

Noncoding segments that are removed from the transcript before translation are introns. After a gene is transcribed, the initial RNA product (pre-mRNA) contains both introns and exons. The introns are cut out and the remaining exons are spliced together to form mature mRNA, which then serves as the blueprint for protein synthesis. Exons are the coding parts that stay in the final mRNA. Promoters are DNA regions that help start transcription by recruiting RNA polymerase, and enhancers are regulatory elements that boost transcription levels. So introns are the correct term because they are the noncoding pieces removed during RNA processing before translation.