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Question

Multiple Choice Question
Cry II Ab and Cry I Ab produce toxins that control

A
Cotton bollworms, corn borer
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B
Corn borer, cotton bollworms
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C
Tobacco budworms, nematodes
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D
Nematodes, tobacco budworms
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E
Corn borer, tobacco budworms
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Solution

The correct option is A Cotton bollworms, corn borer
The soil bacterium Bacillus thuringiensis produces crystal proteins called cry proteins, that are toxic to larvae of insects like Tobacco budworm, armyworm, beetles and mosquitoes. cry I Ab controls corn borer. Cry I Ab and cry II Ab control cotton bollworms. Cry III Ab controls colarado potato beetle. Cry III Bb controls corn rootworm.

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