NEET 2015
- Exam
- NEET
- Year
- 2015
- Subject
- Zoology
- Chapter
- Biotechnology and Its Applications
NEET 2015 · Zoology · Biotechnology and Its Applications
In Bt cotton, the Bt toxin present in plant tissue as pro-toxin is...
In Bt cotton, the Bt toxin present in plant tissue as pro-toxin is converted into active toxin due to:
Options
- AAlkaline pH of the insect gut
- BAcidic pH of the insect gut
- CAction of gut micro-organisms
- DPresence of conversion factors in insect gut
Correct answer
A. Alkaline pH of the insect gut
Step-by-step solution
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.