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| 1. |
Question : Crystals of Bt toxin produced by some bacteria do not kill the Bacteria them. (a) bacteria are residant to the toxin (b) toxin is immature, © toxin is inactive, (d) bacteria encloses toxin in a special sac. |
| Answer» Solution :The Bt PROTEIN EXISTS as inactive protoxins but once an INSECT ingests the inactive toxin . It is CONVERTED into an active form of toxin due to the ALKALINE pH of the gut which solubilise the crystals. | |