ReNEET 2026 · Biology · Q137Biotechnology and its ApplicationsIn our bank: Exact match · 96%
The inactive form of Bt toxin is converted to the active form in the insect gut _______.
- A.due to alkaline pH✓
- B.due to acidic pH
- C.by proteases
- D.by nucleases
Correct Answer
(A) due to alkaline pH
Solution & Explanation
Bt toxin is produced as an inactive protoxin (crystal). When ingested by an insect, the alkaline pH of the gut solubilises the crystals and converts the protoxin into the active toxin, which binds the gut epithelium and kills the insect.
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