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Exons and Introns

Exons and Introns. -RNA transcript, while in the nucleus, is composed of exons, sequences of nucleotides that carry useful information for protein synthesis, and introns, sequences that do not. Exons and Introns. -Before leaving the nucleus, introns are removed and exons are spliced together.

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Exons and Introns

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  1. Exons and Introns -RNA transcript, while in the nucleus, is composed of exons, sequences of nucleotides that carry useful information for protein synthesis, and introns, sequences that do not

  2. Exons and Introns -Before leaving the nucleus, introns are removed and exons are spliced together

  3. Exons and Introns -The processed transcript, called mRNA, carrying the appropriate sequence for a protein, is transported from the nucleus to the ribosome for translation

  4. Cut That Out! Given the nRNA sequences, exons, and introns, write the proper mRNA sequences: exon intron exon intron 1. A U G C U | G U U G | A C A C U A U | C G G exon intron exon 2. A U G | G C C A A U A C U A | A U G G G A intron exon intron exon intron exon 3. C A G U | A U G | A G C | G G | A U C | U Analysis Questions: 1. What does every mRNA sequence begin with? 2. How many nitrogen bases are in the mRNA of numbers 1, 2, and 3? What factor do they have in common?

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