Bacillus thuringiensis which contain cry protein in inactive form known as pro-toxin. When this is ingested by insect it get activated by alkaline ph of gut, which solubilize the protein crystal. This activated toxin bind to the epithelial midgut cell result into lysis of epithelial cell and eventually lead to the death of insect.
In Bt cotton, the Bt toxin present in plant tissue as pro-toxin is converted into active toxin due to:
NEET UG 2015 — Zoology Biotechnology and Its Applications
2015mcqeasy
In Bt cotton, the Bt toxin present in plant tissue as pro-toxin is converted into active toxin due to:
Official previous-year question
Held on 30 Apr 2015 · Verified 9 Jul 2026.
Options
- A
Alkaline pH of the insect gut
- B
Acidic pH of the insect gut
- C
Action of gut micro-organisms
- D
Presence of conversion factors in insect gut
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