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D1.2.19 (HL)—Amino acid recycling by proteasomes

Proteasomes recycle amino acids by degrading damaged, misfolded or unneeded proteins into reusable components for new protein synthesis and quality control.

Syllabus
First assessment 2025
Objective
D1.2.19
Level
HL

Concept essentials

  • Proteasomes degrade selected proteins inside cells.
  • Ubiquitin tagging can target proteins for proteasome breakdown.
  • Protein degradation releases amino acids that can be reused.
  • Amino acid recycling supports new protein synthesis and quality control.
ConceptIB Biology HL