RNA Processing exam
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Last updated 8:29 PM on 6/12/25
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13 Terms
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Main purpose of RNA processing
To prepare pre-mRNA for translation
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Three main RNA processing steps
5′ capping, splicing, and 3′ polyadenylation
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5′ capping addition
A modified guanine nucleotide
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Function of the 5′ cap
Protects mRNA and helps ribosome binding
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Poly-A tail
A stretch of adenines (A's) added to the 3′ end of mRNA
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Function of the poly-A tail
Stabilizes mRNA and helps export from the nucleus
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What removes introns from pre-mRNA
The spliceosome
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Exons
Coding regions that remain in mature mRNA
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Introns
Noncoding regions removed during splicing
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snRNPs composition
Small nuclear RNA (snRNA) and proteins
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Alternative splicing
Joining exons in different combinations to make multiple proteins from one gene
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RNA editing
The alteration of RNA sequence after transcription
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Codon
A sequence of 3 RNA bases that code
Note 
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