Question

Cry I Ab and cry II Ab produce toxins that control

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

Answer 1

The correct option is A

Explanation of the correct option:

1. Bt toxin is coded by a gene named Cry.
2. There are a number of cry genes that control toxins against various organisms.
3. 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.
4. Tobacco pests are controlled via gene silencing induced by RNAi.

Explanation of the incorrect option:

Other option B,C and D didnot satisfy the appropriate explanation of the given question.

Final answer: Cry I Ab and cry II Ab produce toxins that control Cotton bollworms and corn borer respectively