Home Biology Biotechnology and Its Application NCERT Bt toxin kills insects by
Biology Biotechnology and Its Application NCERT Single Correct MCQ
Published on: August 20, 2026

Bt toxin kills insects by

A
inhibiting protein synthesis
B
generating excessive heat
C
creating pores in the midgut epithelial cells, leading to cell swelling and lysis
D
obstruction of biosynthetic pathway

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The correct answer is:
C

Bt toxin binds to receptors in the insect’s midgut cells, forms pores, disrupts cell integrity, and causes cell lysis, leading to insect death.

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