Question

What is true about Bt toxin?

• A. The activated toxin enters the ovaries of the pest to sterilise it
• B. Bt protein exists as active toxin in Baccillus
• C. The inactive pro-toxin gets converted into active form in the insect gut.
• D. all of these

Answer 1

The correct option is C The inactive pro-toxin gets converted into active form in the insect gut.

The Bt toxin protein exists as inactive protoxin in the Bacillus. But once an insect ingests the inactive toxin, it is converted into an active form of toxin due to the alkaline pH of the gut which solubilises the crystals.