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cryII Ab and cry I Ab produce toxins tha...

cryII Ab and cry I Ab produce toxins that control:

A

Cotton bollworm and corn borer respectively

B

Corn borer and cotton bollworms respectively

C

Tobacco bud-worms and nematodes respectively

D

Nemattodes and tobacco bud - worms respectively

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The correct Answer is:
A
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The protein products of the following Bt toxin genes cryIAc and cryIIAb are responsible for controlling:

Bt toxin is produced by a bacterium called Bacillus thuringiensis ( Bt for short). These Bt toxin crystals contain by a gene named cry which has many variants. Which one from the following produces a toxin that controls corn borer ?

Gene cry IAb controls

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?

PHYSICS WALLAH-BIOTECHNOLOGY AND ITS APPLICATIONS-LEVEL-2
  1. Nif' gene for nitrogen fixation in cereal crops like wheat jowar etc.,...

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  2. Crystals of Bt toxin produced by some bacteria do not kill the bacte...

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  3. Bt toxin gene has been cloned from the bacteria and expressed in plant...

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  4. cryII Ab and cry I Ab produce toxins that control:

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  5. "A probe is allowed to hybridize with its complimentary DNA in a clone...

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  6. Which of the following risks are associated with genetically modified...

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  7. Flavr Savr' variety of tomato which remains fresh for a longer period ...

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  8. Match the columns-

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  9. Match the columns-

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  10. Two stages of insulin (Stage P and Stage Q) are shown in the diagram. ...

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  11. The genetic defect-adenosine deaminase (ADA) deficiency may be cured p...

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  12. Which of the following technique is being used to detect mutation in g...

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  13. What is the most appropriate reason for the survival of bacteria Bacil...

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  14. Eli Lilly, an American company prepared two DNA sequences correspondin...

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  15. Regarding transgenic tobacco plants which is resistance to the nematod...

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  16. Some of the characteristics of Bt cotton are

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  17. Match the columns and find the correct combinations:

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  18. Select the incorrect statement

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  19. Regarding Bt cotton, correct statements are: A. Bt enters the midgu...

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  20. The incorrect statement among the following is

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