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Question

Bt toxin kills the insect by


Your Answer
A
blocking mitochondrial respiration
Your Answer
B
blocking transfer of nerve impulse
Your Answer
C
creating pores in body surface
Correct Answer
D
creating pores in mid-gut epithelial cell

Solution

The correct option is D creating pores in mid-gut epithelial cell
After ingestion by the insect, the protoxin is converted/cleaved into shorter versions of the protein that display the toxic activity. These bind to the mid gut epithelium and create pores that cause cell swelling and lysis. The insect is unable to feed and consequently starves to death.
 

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