The document discusses the process of protein synthesis, which involves mRNA carrying genetic code from DNA in the nucleus to ribosomes in the cytosol. tRNA then picks up specific amino acids according to their anticodons and binds them to the mRNA codons during translation. The genetic code is made up of three nucleotide mRNA codons that each specify one of 20 amino acids. The document provides an example of translating an mRNA sequence to the corresponding amino acid sequence.