Answer: Joined by disulphide bonds to form human insulin.
- A Injected separately into patients as two unlinked chains
- B Left as inactive proinsulin
- C Joined by disulphide bonds to form human insulin
- D Converted into the C peptide
Correct answer: C. Joined by disulphide bonds to form human insulin
Explanation: The A and B chains were produced in E. coli and then combined by creating disulphide bonds to form the functional human insulin.
Concept context
GM crops, transgenic animals, gene therapy, molecular diagnostics, and bioethics. Frequent 2–3 mark questions in NEET.