Recombinant insulin production benefits

Steps:

• Identify the process: Human insulin gene is inserted into bacteria, which replicate and produce insulin in large quantities.
• Compare to animal insulin: Animal sources are limited by slaughter and extraction, while bacteria enable mass production.
• Evaluate advantages: Focus on availability, purity, and scalability for patient use.
• Eliminate misconceptions: Rule out genetic transfer or physiological changes in patients.

Why C is correct:

• Bacterial cultures allow unlimited, cost-effective scaling via fermentation, ensuring consistent supply unlike finite animal sources.

Why the others are wrong:

• A: Insulin therapy treats symptoms but does not alter or pass on diabetes genes.
• B: Exogenous insulin replaces missing production but does not restore pancreatic function.
• D: Administered insulin is a protein, not a gene, so no DNA transfer occurs to patients.

Final answer: C