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Biotechnology and its Applications — BIOLOGY STD 12 Science — Question

Rajasthan BoardEnglish MediumSTD 12 ScienceBIOLOGYBiotechnology and its Applications2 Marks
Question
What do 'cry' genes in Bacillus thuringiensis code for? State its importance for cotton crop.
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Answer

  • 'cry' genes code for certain Crystal (Cry) proteins, called Bt toxins that are toxic to certain insect larvae.
  • The genes cryl Ac and cryll Ab control cotton bollworm, when these genes are introduced into cotton plants through genetic engineering, the cotton plants are made resistant to the attack of cotton bollworm.

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