Correct answer: C). Since the genetic code is the same across species, these species must have inherited it from a common ancestor.
The production of human insulin is a multi-step biochemical process that depends upon the recombinant DNA technology and insulin gene. In the production of human insulin the insulin gene is inserted into bacteria and then it is grown on suitable media and bacteria grow on that media. The bacteria produces insulin that is harvested and packed in a vial and sends to the market for the patient. The genetic code is universal, it means that the same codon code for same amino acid in all organism.
