Crystals of Bt toxin produced by some bacteri | vedclass

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Question

(B) The $Bt$ toxin produced by the bacterium $Bacillus 	ext{ } thuringiensis$ exists in an inactive protoxin form within the bacterial cell. It only

Vedclass · Accepted Answer

Toxin is inactive

Vedclass · Answer

(B) The $Bt$ toxin produced by the bacterium $Bacillus 	ext{ } thuringiensis$ exists in an inactive protoxin form within the bacterial cell. It only becomes active when it is ingested by an insect, where the alkaline $pH$ of the insect's gut solubilizes the crystals and converts the protoxin into its active toxic form. Therefore, the bacteria remain unharmed because the toxin is not in its active state while inside the bacterial cell.

Crystals of $Bt$ toxin produced by some bacteria do not kill the bacteria themselves because . . . . . .

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