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How is the 5' end of a eukaryotic mRNA modified during RNA processing?
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10. Transcription
RNA Modification and Processing
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Portions of eukaryotic mRNA sequence that are removed during RNA processing are ________.
A
codons
B
exons
C
introns
D
promoters
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Understand the structure of eukaryotic genes: they consist of coding regions called exons and non-coding regions called introns.
Recognize that during RNA processing, the initial mRNA transcript (pre-mRNA) includes both exons and introns.
Recall that introns are the portions of the mRNA sequence that are removed or spliced out during RNA processing.
Know that exons are the sequences that remain and are joined together to form the mature mRNA that will be translated into protein.
Therefore, the correct term for the portions removed during RNA processing is 'introns'.
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