Which of the following statements is not correct

Options

A. In man insulin is synthesised as a proinsulin
B. The proinsulin has an extra peptide called C-peptide
C. The functional insulin has A and B chains linked together by hydrogen bonds
D. Genetically engineered insulin is produced in E.Coli

Answer

C

Explanation

Because functional insulin has A and B chains linked together by disulphide bonds.