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Biotechnology and its Applications — BIOLOGY STD 12 Science — Question

Gujarat BoardEnglish MediumSTD 12 ScienceBIOLOGYBiotechnology and its Applications3 Marks
Question
  1. Which insects are killed by Bacillus thuringiensis?
  2. The Bt binds to which cells?
  3. In which plants Bt toxin is used?
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Answer

  1. The activated toxin binds to the surface of midgut epithelial cells and creates pores that cause cell swelling and lysis leading to the death of an insect.
  2. Bacillus thuringiensis forms protein crystals (Cry) during a particular phase of their growth. These crystals contain a toxic insecticidal protein.

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