The toxic component of Bacillus thuringiensis | vedclass

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Question

(D) $Bacillus$ $thuringiensis$ $(Bt)$ produces insecticidal crystal proteins known as $Cry$ proteins.These proteins exist in an inactive protoxin form

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Protein

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(D) $Bacillus$ $thuringiensis$ $(Bt)$ produces insecticidal crystal proteins known as $Cry$ proteins.These proteins exist in an inactive protoxin form within the bacterium.When ingested by an insect,the alkaline $pH$ of the insect's gut solubilizes the crystals,converting the protoxin into an active toxin.This active toxin binds to the surface of midgut epithelial cells and creates pores,causing cell swelling and lysis,eventually leading to the death of the insect.

The toxic component of $Bacillus$ $thuringiensis$ is:

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