1. mRNA that acts as a template.
2. tRNA that carries specific amino acids.
3. Ribosomes that act as protein building sites. It has three binding sites. A-site, P-site and E-site.
4. Activating enzymes. These are called amino-acyl tRNA synthetase. It reacts with amino acids and ATP to form AA-AMP.
5. 64 types of codons for 20 amino acids.