D2.2.3 (HL)—Control of mRNA degradation
mRNA degradation controls expression duration by removing transcripts so translation stops when proteins are no longer needed by cells later.
- Syllabus
- First assessment 2025
- Objective
- D2.2.3
- Level
- HL
Concept essentials
- Stable mRNA can be translated repeatedly.
- mRNA degradation reduces the time available for translation.
- Poly-A tail shortening can help mark mRNA for removal.
- Post-transcriptional control changes protein production after mRNA has been made.
ConceptIB Biology HL