Question

Cry II Ab and cry I Ab produces toxins that control

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

Answer 1

The correct option is A Cotton bollworms and corn borer respectively

Bt toxins are insect-group specific. The toxin is coded by a gene named cry. There are a number of them, for example, the proteins encoded by the genes cryIAc and cryIIAb control the cotton bollworms, that of cryIAb controls corn borer.