This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Medicine
Staing material for production of insulin from bacteria is: 
Select and explain. 
A. Genomic DNA from beta pancreatic cells of human, B. Genomic DNA from lymphocytes of human, C. mRNA from beta pancreatic cells of human, D. mRNA from lymphocytes of human
C: mRNA from beta pancreatic cells of human
Answer: C: mRNA from beta pancreatic cells of human 
Explanation: C i.e. mRNA from beta pancreatic cells of human Staing material for production of insulin from bacterial cells (E.coli) using recombination DNA technology is mRNA from beta pancreatic cells of humanQ.