forms protein crystals which contain insecticidal protein. This protein:
- AIs activated by acid of the foregut of the insect pest.
- BDoes not kill the carrier bacterium which is itself resistant to this toxin.
- CBinds with epithelial cells of midgut of the insect pest ultimately killing it.
- DIs coded by several genes including the gene .
Solution & Step-by-step Explanation
The toxin exists as inactive protoxin in the bacterium. Once an insect ingests it, the alkaline of the midgut solubilizes the crystals. The activated toxin binds to the surface of midgut epithelial cells, creating pores that cause cell swelling and lysis.