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Biology · 2024 · 3 marks
CBSE 2024 · Region 2 · Set 1 · Q26
The picture given below shows: (a) Roots of a typical control tobacco crop plant (infected). (b) Transgenic tobacco plant showing healthy roots even…
The picture given below shows :
(a)
Roots of a typical control tobacco crop plant (infected).
(b)
Transgenic tobacco plant showing healthy roots even after deliberate infection by nematode.
Explain how this transformation was achieved in the tobacco plant.
Marking-scheme solution
Introduction of nematode specific gene using Agrobacterium vector, Production of both sense and anti-sense RNA in host cell, Production of dsRNA, RNAi/RNA interfernce is initiated, silencing of specific mRNA of the nematode, Parasite could not survive in the transgenic host and transgenic plant is protected from the parasite.
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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.