What is true about Bt toxin? | vedclass

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(D) $Bt$ toxin is produced by the soil bacterium $Bacillus$ $thuringiensis$. It is produced as an inactive protoxin within the bacterium,which is why

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The inactive protoxin gets converted into active form in the insect gut.

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(D) $Bt$ toxin is produced by the soil bacterium $Bacillus$ $thuringiensis$. It is produced as an inactive protoxin within the bacterium,which is why it does not kill the host. When an insect ingests the protoxin,the alkaline $pH$ of the insect's gut solubilizes the crystals and converts the inactive protoxin into an active toxin. This active toxin binds to the surface of the midgut epithelial cells,creating pores that cause cell swelling,lysis,and eventually the death of the insect.

Column-$I$	Column-$II$
$(1)$ Corn	$(a)$ Bollworms
$(2)$ Tobacco	$(b)$ Bookworms
$(3)$ Cotton	$(c)$ Corn borer
	$(d)$ Meloidogyne incognita

What is true about $Bt$ toxin?

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