What triggers activation of protoxin to active Bt toxin of Bacillus thuringiensis in boll worm?

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faiz · Answer 1 · 2019-07-30T00:33:51+0000

The correct option is (3) Alkaline pH of gut

Explanation:

Bt toxins are initially inactive protoxins but after ingestion by the insect these inactive toxin becomes active due to the alkaline pH of the gut which solublise the crystals. Hence, high pH value is required to make Bt toxins active. Under high temperature and acidic pH, Bt toxins remain insoluble and inactive.