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What is true about toxin?

  1. A
    protein exists as active toxin in the Bacillus.
  2. B
    The activated toxin enters the ovaries of the pest to sterilise it.
  3. C
    The concerned Bacillus has antitoxins.
  4. D
    The inactive protoxin gets converted into active form in the insect gut.

Solution & Step-by-step Explanation

toxin is produced by Bacillus thuringiensis as inactive crystalline proteins (protoxins). When an insect ingests it, the alkaline pH of its gut solubilizes the crystals and converts the protoxin into its active form, which then creates pores in the midgut, leading to cell swelling and death.

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What is true about toxin?
A
protein exists as active toxin in the Bacillus.
B
The activated toxin enters the ovaries of the pest to sterilise it.
C
The concerned Bacillus has antitoxins.
D
The inactive protoxin gets converted into active form in the insect gut.

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BiotechnologyBt ToxinBiopesticides

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