Arrange the following steps involved in the activation of B…

Biology Biotechnology and Its Application Statement Based Questions Single Correct MCQ

Published on: August 21, 2026

Arrange the following steps involved in the activation of Bt toxin in insects:

Ingestion of inactive protoxin
- - - -

Binding of activated toxin to midgut epithelial cells
-(E) - -(E)- -

Conversion of protoxin to active toxin in the insect's gut
- - - -

Creation of pores leading to cell lysis
(E) Death of the insect Choose the correct sequence of events from the options given below: - -(E) -(E)

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The Bt toxin protein exist as inactive protoxins but once an insect ingest the inactive toxin, it is converted into an active form of toxin due to the alkaline pH of the gut which solubilise the crystals. The activated toxin binds to the surface of midgut epithelial cells and create pores that cause cell swelling and lysis and eventually cause death of the insect.

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