Ans.
Proteins are synthesized by the genes by the process of transcription and translation. Transcription involves synthesis of mRNA molecule that contain information for amino acid sequence in the form of triplet genetic codes, from DNA. Translation involves formation of polypeptide chain according to the information present in mRNA.
During protein synthesis, a specific amino acid is coded by a specific genetic code present in gene sequence.
Thus, for mass production of a particular protein, the amino acid sequence of that protein must be known as each amino acid will show a specific codon, having three nucleotide bases and sequence of the gene will be identified to synthesize gene for that protein.