This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Techniques in molecular biology, Subject name: Biochemistry
The first human protein produced by rDNA technology: 
Select and explain. 
A. Insulin, B. Growth hormone, C. Albumin, D. Casein
A: Insulin
Answer: A: Insulin 
Explanation: The first human protein produced by rDNA technology is Insulin. Production of recombinant Insulin: NOTE: Gene coding for insulin is localized on 11p15 site of chromosome.