Question

What is true of Bt toxin?

• A. The concerned Bacillus has antitoxins
• B. The inactive protoxin gets converted into active form in the insect gut
• C. Bt toxin exists as active toxin in the Bacillus
• D. The activated toxin enters the ovaries of the pest to sterilize it and thus prevents its multiplication

Answer 1

The correct option is B The inactive protoxin gets converted into active form in the insect gut

Bt toxin is inactive toxin secreted by bacteria Bacillus thuringiensis. It requires alkaline medium to get active which is possible in insect gut. The toxin produced by Bacillus thuringiensis (Bt) has been used as an insecticide spray and is commonly used in organic farming.