How does a DNA molecule determine the structure of a specific protein

From the template strand of DNA, a strand of mRNA is synthesised. The mRNA strand consists of many codons (3 nucleotides). Each codon codes for a specific protein. For example, AUG codes for Methionine. The codon for each amino acid is specific.

The tRNA molecule has an anticodon site which decodes and is complementary to the codon on the mRNA. On the other end of the tRNA a specific amino acid binds. This way, with every codon read, a specific amino acid is strung to form the chain of amino acids to make a specific protein.