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The trigger for activation of toxin of B...

The trigger for activation of toxin of Bacillus thuringiensis is:

A

acidic pH of stomach

B

high temperature

C

alkaline pH of gut

D

mechanical action in the insect gut

Text Solution

Verified by Experts

The correct Answer is:
C
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If you engineer the gene for Bt toxin from Bacillus thuringiensis into a tomato plant, the resulting plant will be:

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. Some strains of Bacillus thuringiensis can kill certain insects such as

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ARIHANT NEET-BIOTECHNOLOGY AND ITS APPLICATIONS -CHAPTER EXERCISES ((A) TAKING IT TOGETHER )
  1. Which of the following is not included under the application of ...

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  2. C-peptide of human insulin is

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  3. The trigger for activation of toxin of Bacillus thuringiensis is:

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  4. Biopiracy is

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  5. Production of value added products like nutrition supplements, ...

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  6. Bacillus thuringiensis (Bt) strains have been used for designing novel

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  7. An important objective of biotechnology in agriculture section is to

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  8. Rules of conduct that may be used to regulate our activities in relati...

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  9. Which Indian plants have either been patented or attempts have been ma...

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  10. Biopatents means

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  11. Bt toxin genes are isolated from Bacillus thuringiensis and incorpo...

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  12. By the use of biotechnology , in which bacteria production of vit...

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  13. Silencing of a gene could be achieved through the use of

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  14. Hybridomas are employed for

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  15. Human gene therapy requires

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  16. The slow ripening transgenic tomato was developed in USA by using

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  17. Kohler and Milstein developed a method in biotechnology for the prod...

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  18. A transgenic food crop which may help in solving the problem of nigh...

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  19. Immobilished enzymes are obtained by ……method.

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  20. Biosensors are

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