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Question

Bt-cotton has an insecticidal property. Chemically this insecticide is a

A
Protein
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B
Lipid
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C
Carbohydrate
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D
Vitamin
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Solution

The correct option is C Protein
Bt crops are crops that are genetically modified to produce the Bt toxin in the plant. Bt toxin is naturally produced in Bacillus thuringiensis. It is a crystal protein that is toxic to pest. Bt crops are genetically engineered to produce the same proteinin every cell of the plant. It acts as natural insecticides. It kills Lepidoptera larvae by forming pores in the gut of the insect. The protein is synthesized as an inactive protein inside the bacterium but the alkaline conditions of the gut of the insect transforms the inactive protein into an active form.
Thus, the correct answer is option A.

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