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| The protein product encoded by the Bt toxin gene cryIAb is responsible to control which one of the following insect -group ? |
Cotton bollworms. Corn borers. Fruit flies . All of these. |
| Corn borers. |
| 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. |
