NEET 2023 · Class 12

Biotechnology and its Applications

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.

The NCERT line that answers it

Verbatim line

Insulin consists of two short polypeptide chains: chain A and chain B, that are linked together by disulphide bridges (Figure 10.3).

Chapter
Biotechnology and its Applications
Section
10.2.1 Genetically Engineered Insulin
Page
4
Words matched
21 of 21

The answer appears as a continuous sentence in NCERT. This is that sentence.

How this line gives the answer

0, emb=1.0, combined=1.0). Verified: high — The span explicitly states 'Insulin consists of two short polypeptide chains: chain A and chain B', which directly contradicts option A's claim of three polypeptide chains (A, B and C), making A the incorrect statement.

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Question text is reproduced from the published NEET 2023 paper for study and commentary. NCERT text is quoted, not redistributed; textbooks remain at ncert.nic.in. Our mapping method, including its measured error rates, is published at /methodology.