The coding sequences of a gene are known as

The coding sequences of a gene are known as

• A. Introns
• B. Exons
• C. Regulatory regions
• D. Promoters

Answer: (B)

Coding sequences are the parts of a gene that are kept in the mature mRNA after the introns are removed and are then translated into protein. These coding portions are called exons. Introns are the intervening sequences that are spliced out before translation, so they don’t contribute to the protein sequence. Regulatory regions and promoters, on the other hand, control when, where, and how much a gene is expressed rather than encoding the amino acid sequence of the protein. So the coding sequences of a gene are exons.

Coding sequences are the parts of a gene that are kept in the mature mRNA after the introns are removed and are then translated into protein. These coding portions are called exons. Introns are the intervening sequences that are spliced out before translation, so they don’t contribute to the protein sequence. Regulatory regions and promoters, on the other hand, control when, where, and how much a gene is expressed rather than encoding the amino acid sequence of the protein. So the coding sequences of a gene are exons.