Option (1) is the correct answer because the activated toxin binds to the surface of midgut epithelial cells and creates pore that cause cell swelling and lysis and eventually cause death of the insect. Bt toxin doesn't kill pest by affecting their respiratory system, nervous system and it doesn't alter the pH of body fluids. So, options (2), (3) and (4) are not the answer.
The B t toxin in genetically engineered B t cotton kills the pest by:
NEET UG 2024 — Zoology Biotechnology and Its Applications
2024mcqeasy
The Bt toxin in genetically engineered Bt cotton kills the pest by:
Official previous-year question
Held on 30 Apr 2024 · Verified 9 Jul 2026.
Options
- A
Creating pores in the midgut
- B
Damaging the respiratory system
- C
Degenerating the nervous system
- D
Altering the pH of body fluids
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