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Question

Cry I Ab and cry II Ab produce toxins that control

A
Cotton bollworms and corn borer respectively
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B
Tobacco budworms and nematodes respectively
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C
Nematodes and tobacco budworms respectively
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D
Corn borer and tobacco budworms respectively
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Solution

The correct option is A Cotton bollworms and corn borer respectively

Bt toxin is coded by a gene named Cry. There are a number of cry genes that control toxins against various organisms. For e.g, the proteins coded by genes Cry I Ac and Cry II Ab control the cotton bollworms while that of Cry I Ab controls corn borer. Tobacco pests are controlled via gene silencing induced by RNAi.


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