The Bt toxin protein exist as inactive pro-toxins but once an insect ingest the inactive toxin, it is converted into an active form. From the following identify the correct cause of activating the tox

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The Bt toxin protein exist as inactive pro-toxins but once an insect ingest the inactive toxin, it is converted into an active form. From the following identify the correct cause of activating the toxin.

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Bacillus thuringiensis produces proteins that kill certain insects such as lepidopterans (tobacco budworm, armyworm), coleopterans (beetles), and dipterans (flies, mosquitoes). B. thuringiensis forms protein crystals that contain a toxic insecticidal protein. The Bt toxin protein on ingestion is converted into an active form due to the alkaline pH of the gut of insects which solubilize the crystals.

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