What triggers activation of protoxin to active Bt toxin of …

Biology Biotechnology and Its Application NCERT Single Correct MCQ

Published by: CGP EDU Academic Team

Published on: August 21, 2026

What triggers activation of protoxin to active Bt toxin of Bacillus thuringiensis in bollworm?

Moist surface of midgut

Alkaline pH of gut

Acidic pH of stomach

Body temperature

Text Solution

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The correct answer is:

In bollworm, the Bt protoxin gets activated in the alkaline environment of the insect gut, where it becomes toxic and kills the insect.

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