NEET Biology question
*Bacillus thuringiensis* forms protein crystals which contain a toxic insecticidal protein. This protein I. is activated by alkaline pH of the gut of the insect pest II. binds with the epithelial cells of the midgut of the insect pest, ultimately killing it III. does not kill the carrier bacterium, which is itself resistant to this toxin Which of the statements given above are correct?
Answer: (D)
Solution
All three statements accurately describe the *Bt* toxin mechanism: it is activated by the alkaline insect-gut pH, it binds to and damages midgut epithelial cells
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