Protein Synthesis starts with DNA in transcription. When DNA is being replicated there are mRNA witch copy's DNA corresponding pairs. Then mRNA molecule attach to ribosomes (which make proteins)which started Translation. And the message on the mRNA is translated with the help of tRNA witch have the matching bases on the mRNA. They use their amino acides on them to make long starts of proteins. And a new protein is added everytime there is mathching tRNAand mRNA bases.