Q173 / 180 · NEET 2020 (Phase 1) · Zoology

Which of the following statements is not correct?

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

Solution

Insulin is a relatively small protein, comprising two polypeptides, one of 21 amino acids (the A chain) and the other of 30 amino acids (the B chain) that are linked together by disulphide bonds/bridges formed between cysteine amino acids.

Hence, the correct answer is option: 'B'.

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