The protein product encoded by the Bt toxin gene cryIAb is responsible to control which one of the following insect -group ?
Answer & explanation
Correct answer: option 2
Specific Bt toxin genes were isolated from Bacillus thuringiensis and
incorporated into the several crop plants such as cotton .
The choice of genes depends upon the crop and the targeted pest, as
most Bt toxins are insect-group specific. The toxin is coded by a gene
cryIAc named cry. There are a number of them, for example, the proteins
encoded by the genes cryIAc and cryIIAb control the cotton bollworms,
that of cryIAb controls corn borer.