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Biology · 2024 · 2 marks
Biotechnology and its ApplicationsBiotechnological Applications in Medicine2 marksUnderstandvery short answer
CBSE 2024 · Region 4 · Set 1 · Q19
(a) Name the source from which insulin was extracted in earlier times. Why is this insulin no more in use by the diabetic patients? (b) Why does the…
(a)
Name the source from which insulin was extracted in earlier times. Why is this insulin no more in use by the diabetic patients ?
(b)
Why does the insulin synthesised in the human body undergo processing whereas the insulin produced by Eli Lilly company does not need to undergo any processing? Explain.
Marking-scheme solution
(a)
Insulin was earlier extracted from pancreas of slaughtered cattle or pigs
(animals), This Insulin from an animal source may develop allergy or other types of reactions in human body to foreign proteins.
(b)
In human insulin is synthesized as a prohormone. It contains an extra stretch called C – peptide which needs to be removed before it becomes functional, this ‘C’ peptide is absent in Eli Lilly company insulin.
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CBSE Class 12 Biology past-paper question from the 2024 board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.