The Bt toxin is not toxic to human beings because.

the pro Bt toxin activation requires temperature above human body temperature

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the Bt toxin recognize only insect-specific targets.

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the Bt toxin formation from pre Bt toxin requires pH lower than that present in human stomach

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conversion of pro Bt toxin to Bt toxin takes place only in highly alkaline conditions

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Solution

The correct option is C the Bt toxin formation from pre Bt toxin requires pH lower than that present in human stomach
The human stomach digests the concentrated protein and so it cannot be of any toxic potential to us.
So, the correct option is 'The Bt toxin formation from pre-Bt toxin requires pH lower than that present in the human stomach'.

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In Bt cotton,the Bt toxin present in plant tissue as pro-toxin is converted into active toxin due to:

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