NEET2019Zoology-Biotechnology
NEET 2019 Zoology Bt Cotton MCQ Question
Type: MCQ-conceptual-Medium-Class 12
What triggers activation of protoxin to active Bt toxin of the Bacillus thuringiensis in boll worm?
A
Alkaline pH of gut
B
Acidic pH of stomach
C
Body temperature
D
Moist surface of midgut
Correct Answer
Option A
Detailed Explanation
The alkaline pH of the insect gut activates the protoxin to form the active Bt toxin, which is toxic to the insect.
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