how bt toxin cause cell swilling
Answers
Answer:
Soil bacterium Bacillus thruingiensis (Bt) produces proteins that kill certain insects like lepidopterans (tobacco budworm, armyworm), coleopterans (beetles) and dipterans (flies, mosquitoes).Bacillus thuringinesis forms some intracellular protein crystals. These crystals contain a toxic insecticidal protein. The Bt toxin protein exists as an inactive toxin and is converted into an active form due to the alkaline pH of the alimentary canal that solubilities the crystals. The activated toxin binds to the surface of midgut epithelial cells and creates pores which cause cell swelling and lysis and finally cause the death of the insect.
So, the correct answer is 'Toxins occur as inactive protoxins in bacteria'.
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Answer:
they are hypotonic soln which exceed the amount of water conc in cell due to which the cells get swlled
the phenomena used here is osmosis