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Question
A protoxin is ______.
Options
A primitive toxin
A denatured toxin
Toxin produced by protozoa
Inactive toxin
MCQ
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Solution
A protoxin is inactive toxin.
Explanation:
A protoxin is a toxin that is inactive. "Protoxin" refers to an inactive B thuringiensis protein crystal containing a poisonous insecticidal protein (Br toxin).
The inert toxin in Bt. toxin is transformed into an active form once ingested by the lay bug due to the gat's alkaline PH, which solubilizes the crystals.
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