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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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Bt cotton variety that was developed by the introduction of toxin gene of Bacillus thuringiensis (Bt) is resistant to:

What triggers activation of protoxin to active Bt toxin of Bacillus thuringiensis in bollworm?

Knowledge Check

  • Bacillus thuringiensis is used as

    A
    Fungicide
    B
    Biopesticide
    C
    Insecticide
    D
    Weedicide

  • Bt cotton variety that was developed by the introduction of toxin gene of Bacillus thuringiensis (Bt) is resistance to

    A
    Fungal disease
    B
    Plant nematodes
    C
    Insect predators
    D
    Insect pests

  • Toxic component of Bacillus thuringiensis is

    A
    Alkaloid
    B
    Steroid
    C
    Amino acid
    D
    Protein

    • Similar Questions

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    What triggers activation of protoxin to active toxin of Bacillus thuringiensis in boll worm

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

    What is the most appropriate reason for the survival of bacteria Bacillus thruringiensis inspite of having Bt toxin in it?

    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

    Assertion: Bt -toxines kills the Bacillus thuringiensis Reason :Bt-toxins exist as active toxins in Bacillus thuringiensis

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