Select the incorrect statement

Easy

A

Bt toxin protein exist as inactive protoxins.
B

Proteins derived from Bacillus thuringiensis kill insects of only lepidopterans of Insecta.
C

Some strains of Bacillus thuringiensis produce proteins that have insecticidal properties.
D

Once an insect ingest the inactive toxin of Bacillus thuringiensis, it is converted into an active form of toxin due to the alkaline pH of the gut.

Solution

Some strains of Bacillus thuringiensis produce proteins that kill certain insects such as lepidopterans (tobacco budworm, armyworm), coleopterans (beetles) and dipterans (flies, mosquitoes).

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