Questions
Crystals of Bt toxin produced by some bacteria do not kill the bacteria themselves because :
a
bacteria are resistant to the toxin
b
bacterial cells produce mucus
c
toxin exist as inactive protoxins inside bacterial cells
d
bacteria encloses toxin in a special sac
detailed solution
Correct option is C
The Bt toxin protein exist as inactive protoxins inside bacterial cells but once an insect ingest the inactive toxin, it is converted into an active form of toxin due to the alkaline pH of the gut which solubilise the crystals.Talk to our academic expert!
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The activated Bt- toxin binds to the
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