The two polypeptides of human insulin are linked together by (NEET II 2016)

(A)covalent bond
(B)disulphide bridges
(C)hydrogen bonds
(D)phosphodiester bond

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, that are linked together by disulphide bridges', which directly answers the MCQ by specifying the exact bonding type between the two insulin polypeptides.

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