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Why is Bt toxin an endotoxin?...

Why is Bt toxin an endotoxin?

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It is not secreted to outside instead present inside the bacterium as inclusion body.
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Read the following and answer questions from Q.1. to Q.5. given below: Plants having foreign genes in their genome through genetic engineering are called transgenic plants. Genes can be incorporated either through a vector or through direct introduction of DNA. Bt cotton is a genetically modified organism which is pestresistant. It contains gene cry I Ac and cry II Ab of Bacillus thuringiensis. It is used to control lepidopterans, coleopterans and dipterans. Bt cotton can resist cotton bollworm and produce higher yields. Cry gene produces cry protein or Bt toxin. It is an endotoxin which remains as protoxin in plants and converted to active toxin after getting ingested by the insects. Alkaline pH of the insect gut solubilizes the protein crystals, the activated toxin creates pores to the mid guts wall of theinsects which cause them to death. What is true about Bt cotton crops?

AAKASH INSTITUTE-BIOTECHNOLOGY AND ITS APPLICATIONS-TRY YOURSELF
  1. Mention one function of the protein hirudin.

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  2. Name the vector used for introducing gene for hirudin into Brassica na...

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  3. Why is Bt toxin an endotoxin?

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  4. Name the gene that encodes protein controlling growth of corn borer.

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  5. In which part of insect's alimentary canal does Bt toxin become activ...

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  6. Why is the gene coding for Bt toxin called 'cry'?

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  7. RNAi takes place in all prokaryotic organisms. State True/False.

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  8. Meloidegyne is classified under which phuylum of animal kingdom?

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  9. Suggest a source of complementary RNA introduced into target cell that...

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  10. Which vector has employed for introducing nematode-specific genes in i...

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  11. Name the protein whose expression was altered that allowed tomatoes to...

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  12. Name the organism with which the discovery of RNAi is associated.

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  13. Antisense RNA used for silencing a ceellular mRNA in RNAi has sequence...

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  14. If the sequence of sense mRNA is 5' GCGUAACGCU3', then sequence of ant...

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  15. How many recombinant therapeutics worldwide have been approved for hum...

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  16. Which recombinant vaccine is being currently synthesized in india too?

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  17. Name the company associated with preparation and marketing of humulin ...

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  18. How many amino acids are present in completely mature insulin?

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  19. What is the major problem if a person lacks ADA?

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