Biology Biotechnology and Its Application Biotechnology Application in Agriculture Single Correct MCQ
Published on: August 12, 2026

Bt toxin kills the insect by

A
Blocking the nerve conduction
B
Damaging the surface of trachea
C
By creating pores in the tracheal system
D
By creating pores in the mid gut

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The correct answer is:
D

Bacillus thuringiensis (Bt toxin) acts by binding to receptors in the insect’s midgut. It forms pores in the gut epithelial cells, leading to cell lysis, gut paralysis, and ultimately insect death.

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