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Biotechnology and Its Applications
Question
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Cultivation of Bt cotton has been much in the news. The prefix Bt means

  • "Barium-treated" cotton seeds

  • "Bigger thread" variety of cotton with better tensile strength

  • produced by "biotechnology" using restriction enzymes and ligases 

  • carrying an endotoxin gene from Bacillus thuringienesis.

Answer

D.

carrying an endotoxin gene from Bacillus thuringienesis.

Some strains of Bacillus thuringiensis produce proteins that kill certain insects such as lepidopterans (tobacco budworm, armyworm), coleopterans (beetles) and dipterans (flies, mosquitoes). B. thuringiensis forms protein crystals during a particular phase of their growth. These crystals contain a toxic insecticidal protein.

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