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Role of Bt Bacterium as Biocontrol Agent

The trigger f...

Question

The trigger for activation of toxin of Bacillus thuringiensis is _____________.

A

Acitic pH of stomach

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B

High temperature

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C

Alkaline pH of gut

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D

Mechanical action in the insect gut

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Solution

The correct option is C Alkaline pH of gut
The Bt toxin proteins exist as inactive protoxins but once an insect ingests the inactive toxin, it is converted into an active form of toxin due to the alkaline pH of the alimentary canal.

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Role of Bt Bacterium as Biocontrol Agent

Standard XII Biology

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