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.

Answers (1)
S Sonika

(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. 

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