A) oxytocin
B) somatotropin
C) adrenaline
D) insulin
Correct Answer: D
Solution :
Insulin was the first hormone prepared by genetic engineering within the E. coli bacterium. Insulin is made up of two 20 and 30 chains of amino acid residues. Two different E. coli bacterial cultures were used to produce each of the insulin chain, these were then recovered from the bacteria and separated by\[\beta -\]galactosidase and finally, chemically joined to make human insulin.
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