Study the following statements regarding Bt toxins produced by bacterium Bacillus…
Biology · Class 12 · CBSE — Biotechnology and its Applications
Study the following statements regarding Bt toxins produced by bacterium Bacillus thuringiensis and select the correct one.
- Some strains of Bacillus thuringiensis produce proteins that kill certain insects such as lepidopterans, coleopterans and dipterans.
- Bt toxin proteins do not kill the bacteria themselves because the toxin proteins occur in an inactive form called protoxins.
- When an insect ingests the inactive Bt toxin, it is converted to an active form of toxin due to alkaline pH of the gut which solubilises the protein toxin crystals.
- All of the above.
Answer
(D) All of the above.
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