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Chemical Coordination and Integration question

2023 · Q48
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Chemical Coordination and Integration question

2023 · Q48

NEETBiologyChemical Coordination and IntegrationMCQ+4 / −1

Select incorrect statement, regarding chemical structure of insulin.

  1. A
    Mature insulin molecule consists of three polypeptide chains-A, B and C.
  2. B
    Insulin is synthesized as prohormone which contains extra stretch of C-peptide.
  3. C
    C-peptide is not present in mature insulin molecule.
  4. D
    Polypeptide chains A and B are linked by disulphide bridges.
View written solutionFree

Correct answer: A

The incorrect statement is :

Option A : Mature insulin molecule consists of three polypeptide chains-A, B, and C.

The mature insulin molecule actually consists of only two polypeptide chains, A and B, which are linked by disulfide bridges. The C-peptide, or chain C, is present in the proinsulin molecule but is removed during the maturation process to produce the active form of insulin. Therefore, statements B, C, and D are correct.

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