Chap. IX: Ribosome_English_2026

Ribosomes are universal ribonucleoprotein complexes found in all living cells and represent the central machinery of protein synthesis. They translate the genetic information carried by messenger RNA (mRNA) into specific amino acid sequences, leading to the production of functional proteins essential for cellular structure, metabolism, and regulation. Protein synthesis, or translation, is a highly coordinated process involving ribosomes, transfer RNA (tRNA), and various protein factors. It occurs in three main stages: initiation, elongation, and termination. During this process, ribosomes ensure the accurate decoding of the genetic code through codon–anticodon interactions and catalyze the formation of peptide bonds that link amino acids into polypeptide chains.