1. Tardigrade
  2. Question
  3. Biology
  4. Bacillus thuringiensis forms the protein crystals which contain a toxic insecticidal protein. This protein I. is activated by alkaline pH of the gut of the insect pest. II. binds with the epithelial cells of the midgut of the insect pest ultimately killing it. III. does not kill the carrier bacterium which is itself resistance to this toxin. Which of the statements given above are correct?

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Q. Bacillus thuringiensis forms the protein crystals which contain a toxic insecticidal protein. This protein
I. is activated by alkaline pH of the gut of the insect pest.
II. binds with the epithelial cells of the midgut of the insect pest ultimately killing it.
III. does not kill the carrier bacterium which is itself resistance to this toxin.
Which of the statements given above are correct?

Biotechnology and its Applications

Solution:

Bacillus thuringiensis forms the protein crystals, which contain a toxic insecticidal protein. This toxin does not kill the carrier bacterium because the toxin exists as inactive protoxin in it.