Which parts of the gene remain on the mature mRNA after intron removal?

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Multiple Choice

Which parts of the gene remain on the mature mRNA after intron removal?

Explanation:
During RNA processing, the initial transcript contains both coding segments (exons) and noncoding interrupting sequences (introns). The spliceosome removes the introns and stitches the exons together, so the mature mRNA contains only exons. Exons carry the actual coding information (and any untranslated regions), while promoters and terminators are DNA elements that regulate transcription and are not part of the mature mRNA. Sometimes exons can be mixed in different combinations through alternative splicing to produce multiple mRNA variants, but the segments that remain in the mature molecule are exons.

During RNA processing, the initial transcript contains both coding segments (exons) and noncoding interrupting sequences (introns). The spliceosome removes the introns and stitches the exons together, so the mature mRNA contains only exons. Exons carry the actual coding information (and any untranslated regions), while promoters and terminators are DNA elements that regulate transcription and are not part of the mature mRNA. Sometimes exons can be mixed in different combinations through alternative splicing to produce multiple mRNA variants, but the segments that remain in the mature molecule are exons.

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