Bacillus text{ } thuringiensis forms protein | vedclass

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Question

(A) $Bacillus 	ext{ } thuringiensis$ $(Bt)$ produces insecticidal proteins that kill specific insect orders such as lepidopterans, coleopterans, and

Vedclass · Accepted Answer

binds with epithelial cells of midgut of the insect pest, ultimately killing it.

Vedclass · Answer

(A) $Bacillus 	ext{ } thuringiensis$ $(Bt)$ produces insecticidal proteins that kill specific insect orders such as lepidopterans, coleopterans, and dipterans.These proteins are produced as inactive protoxins within the bacterial protein crystals.The toxin remains inactive within the bacterium, so it does not harm the host.When an insect ingests the crystals, the alkaline $pH$ of the insect's midgut solubilizes the crystals and converts the protoxin into its active form.The activated toxin then binds to the specific receptors on the surface of the midgut epithelial cells, creating pores that cause cell swelling, lysis, and eventually the death of the insect.

$Bacillus \text{ } thuringiensis$ forms protein crystals which contain insecticidal protein. This protein

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