Q1. Crystals of Bt toxin produced by some bacteria do not kill the bacteria themselves because –
(a) bacteria are resistant to the toxin
(b) toxin is immature
(c) toxin is inactive
(d) bacteria encloses toxin in a special sac.
(c). Toxin is inactive
The Bt toxin remains inactive in the bacteria. It gets activated after entering the insect gut due to the alkaline pH of the gut.