Which segment of DNA codes for proteins?

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Multiple Choice

Which segment of DNA codes for proteins?

Explanation:
Protein-coding segments are exons. In a typical gene, the initial transcript includes both exons and introns. The introns are removed by splicing, and the remaining exons are joined to form mature mRNA, which is then translated into the protein. So exons carry the information that becomes the amino acid sequence. The other options—promoters and enhancers—regulate transcription rather than being translated, and introns are noncoding regions removed during processing.

Protein-coding segments are exons. In a typical gene, the initial transcript includes both exons and introns. The introns are removed by splicing, and the remaining exons are joined to form mature mRNA, which is then translated into the protein. So exons carry the information that becomes the amino acid sequence. The other options—promoters and enhancers—regulate transcription rather than being translated, and introns are noncoding regions removed during processing.

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