BioCoach Activity

Concept 10: Adding an Amino Acid to tRNA

An enzyme called aminoacyl-tRNA synthetase adds the correct amino acid to its tRNA.


Replay ↻

The correct amino acid is added to its tRNA by a specific enzyme called an aminoacyl-tRNA synthetase. The process is called aminoacylation, or charging.

Since there are 20 amino acids, there are 20 aminoacyl-tRNA synthetases.

All tRNAs with the same amino acid are charged by the same enzyme, even though the tRNA sequences, including anticodons, differ.