Question

CryIIAb and CryIAb produce toxins that control

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

Hint:

CryI and CryII proteins are pest-specific toxins used in Bt crops. Remember: Bt cotton expresses CryIIAb (cotton bollworm), Bt maize expresses CryIAb (corn borer).

Answer 1

The Correct Option is A

Cry proteins produced by genetically modified Bt crops target specific pests. CryIIAb targets Lepidopteran pests like cotton bollworms. CryIAb targets corn borers. They bind to midgut receptors and form pores leading to cell lysis. Other pests like nematodes and tobacco budworms are not primarily affected.