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Solution


Q.

Which of the following statements is not correct                  [2020]
1 In man insulin is synthesised as a proinsulin.  
2 The proinsulin has an extra peptide called C-peptide.  
3 The functional insulin has A and B chains linked together by hydrogen bonds.  
4 Genetically engineered insulin is produced in E. coli.  

Ans.

(3)

Insulin consists of two short polypeptide chains: Chain A and Chain B, that are linked together by disulphide bridges.