Sample Questions — Biotechnology applications in agriculture
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MCQ
Q3. Which of the following is not an advantage of genetic modification in plants?
✅ Correct Answer: C
Transpiration rate control is not mentioned; all other benefits are explicitly stated.
MCQ
Q10. Which of the following are used to transfer genes in crop biotechnology?
1. E. coli
2. Agrobacterium tumefaciens
3. Retrovirus
4. Plasmids
✅ Correct Answer: B
Agrobacterium and plasmids are gene transfer agents in plants; retrovirus is used in animal systems.
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MCQ
Q13. How does RNAi technology protect tobacco plants from nematodes?
✅ Correct Answer: D
RNAi mechanism uses complementary dsRNA to silence specific mRNAs of the nematode, thus preventing its survival in the transgenic plant.
MCQ
In Bt cotton, which gene provides resistance to bollworms?
✅ Correct Answer: B
The cryIAc gene from Bacillus thuringiensis targets bollworms in cotton.
MCQ
Q4. Why can virus-free plants be regenerated from infected ones using meristem culture?
✅ Correct Answer: D
Meristematic tissues are usually free of viruses and thus are used to obtain virus-free plants in tissue culture.
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