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Biology · 2025 · 3 marks
Biotechnology and its ApplicationsBiotechnological Applications in Medicine3 marksUnderstandshort answer
CBSE 2025 · Region 2 · Set 1 · Q27
(a) The insulin synthesised in our body is different from that synthesised by Eli Lilly company using recombinant DNA technology. Differentiate…
(a)
The insulin synthesised in our body is different from that synthesised by Eli Lilly company using recombinant DNA technology. Differentiate between them.
(b)
Why the insulin extracted from an animal source is not in use these days?
Marking-scheme solution
(a)
Insulin synthesized in our body as prohormone (proinsulin) which contain extra stretch of C-peptide apart from A and B peptide, Eli Lilly company synthesized insulin in functional form with only two peptide A and B.
(b)
Insulin from animal sources caused some allergy or other type of immune reactions to the foreign protein / Insulin can be easily obtained in large quantity from bacteria
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CBSE Class 12 Biology past-paper question from the 2025 board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.