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Question

The number of disulphide bonds present in between the A and B chains of insulin are

A
One
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B
Two
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C
Three
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D
Four
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Solution

The correct option is B Two
An active insulin molecule has three disulphide bonds, two between A-peptide and B-peptide and the third within the A-peptide. Disulphide bonds are formed between cysteine residues of peptide chains and help in stabilizing the three dimensional structure of the proteins.

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