During the processing of proinsulin into mature insulin

C-peptide is added to proinsulin

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C-peptide is removed from proinsulin

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B-peptide is added to proinsulin

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B-peptide is removed from proinsulin.

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Solution

The correct option is B C-peptide is removed from proinsulin
Insulin is used for diabetes which is synthesised by a pro-hormone present in humans. The prohormone needs to be processed to become a fully mature and functional hormone as it contains an extra stretch called the C peptide which is not present in the mature insulin.
So, the correct option is 'Option B' .

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