Q. What triggers activation of protoxin to active Bt toxin of $Bacillus\ thuringiensis$ in boll worm?
A) Body temperature
B) Moist surface of midgut
C) Alkaline pH of gut
D) Acidic pH of stomach
Explanation
[Solution] The alkaline pH of the insect gut solubilises and activates the protoxin. Answer (3).
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.