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Biology · 2024 · 3 marks
Biotechnology and its ApplicationsBiotechnological Applications in Agriculture3 marksUnderstandshort answer
CBSE 2024 · Region 4 · Set 3 · Q23
How has the use of Agrobacterium as vector helped in controlling Meloidogyne incognita infestation in tobacco plants? Explain in correct sequence.
How has the use of Agrobacterium as vector helped in controlling Meloidogyne incognita infestation in tobacco plants ? Explain in correct sequence.
Marking-scheme solution
Nematode – Specific genes were introduced into the host plant (tobacco) by using Agrobacterium vectors, the introduction of DNA produced both sense and antisense RNA in the host cells, these two RNA’s being complimentary to each other formed a dsRNA, that initiated RNAi, and thus silenced the specific mRNA of the nematode, and thereby controlled the infestation.
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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.