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OCR A Biology

Mrna Rna Pre Mrna Mature Added Post Transcriptional/Pre Translational Control Processing

Front Post-transcriptional/pre-translational control
Back
RNA processing and editing;
  • pre-mRNA post-transcription needs conversion to mature mRNA before translation
  • RNA splicing removes introns, cap (modified nucleotide) added to front (5') and tail (chain of adenine nucleotides) added to back (3') to stabilise mRNA and prevent degradation
  • can be further modified via mRNA editing (base addition/sub/deletion), so single pre-mRNA can form multitude of different mature mRNA strands

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