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प्रश्न
How has man exploited cry proteins to his benefit?
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उत्तर
The genes cry I Ac and cry II Ab encode proteins that control cottonbollworms, while cry I Ab controls corn borer. Plants having these proteins have natural insect resistance, making them a biopesticide.
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संबंधित प्रश्न
Describe any three potential applications of genetically modified plants.
How has the use of Agrobacterium as vectors helped in controlling Meloidogyne incognita infestation in tobacco plants? Explain in the correct sequence.
Answer the following question.
List one advantage and one disadvantage of an apomictic crop.
GM crops especially Bt crops are known to have higher resistance to pest attacks. To substantiate this an experimental study was conducted in 4 different farmlands growing Bt and non Bt-Cotton crops. The farm lands had the same dimensions, fertility and were under similar climatic conditions. The histogram below shows the usage of pesticides on Bt crops and non-Bt crops in these farm lands.
- Which of the above 4 farm lands has successfully applied the concepts of Biotechnology to show better management practices and use of agrochemicals? If you had to cultivate, which crop would you prefer (Bt or Non- Bt) and why?
- Cotton Bollworms were introduced in another experimental study on the above farm lands wherein no pesticide was used. Explain what effect would a Bt and Non Bt crop have on the pest.
Bt Cotton is resistant to ______.
A protoxin is ______.
Discuss the advantages of GMO.
Explain with the help of one example how genetically modified plants can:
- Reduce usage of chemical pesticides
- Enhance nutritional value of food crops
What is meant by the term bio-pesticide? Name and explain the mode of action of a popular bio-pesticide.
With the help of a suitable example, explain how cry-proteins acts as a biological pesticide.
