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Organism X infects all broad-leaved agri...

Organism X infects all broad-leaved agricultural crops, For genetic engineering, its tumor forming genes are deleted. Here, X is

A

Bacillus thuringiensis

B

Agrobacterium tumefacines

C

Meloidogyne incognita

D

Bacillus amyloliquefaciens

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The correct Answer is:
B
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Which organism is known as Natural Genetic Engineer in plants because of its ability of gene transfer?

The diagram shows the structure of a bacterial cell. The presence of structure C in the bacterial cell is one reason why bacteria are used in genetic engineering . In the cloning vector pBR322, which gene is responsible for the replication of structure X ?

Biotechnology can be defined as the use of biological processes in industry and technology. During the past three decades biotechnology has gained attention due to the gene cloning process. Biotechnological applications are playing important role in agriculture. They are used in agro-chemical based agriculture, in organic farming, genetically engineered crop-based agriculture. The green revolution is the milestone or result of these biotechnological processes. Whihc among the following may be considered as an application of biotechnology ?

Assertion : Agrobacterium tumefaciens is popular in genetic engineering because this bacterium is associated with the roots of all cereal and pulse crops. Reason : A gene incorporated in the bacterial chromosomal genome gets automatically transferred to the crop with which the bacterium is associated .

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?

NCERT FINGERTIPS-PRACTICE PAPERS-Practice paper
  1. Which of the following is a correct match between crop, variety and re...

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  2. Match column I with column II and select the correct option from the g...

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  3. Organism X infects all broad-leaved agricultural crops, For genetic en...

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  4. Which one of the following statements about morula in human is correct...

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  5. The technique called Gamete intra Fallopian Tranfer (GIFT) is recommen...

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  6. Who proposed that the first form of life could have come from pre-exis...

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  7. Which one among the following is an example for homology ?

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  8. Population are said to be sympatric when

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  9. Gynaecomastia is common feature seen in

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  10. In which one of the following options the two examples are correctly m...

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  11. A person suffering from a disease caused by Plasmodium experiences rec...

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  12. Which of the following is an opioid drug ?

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  13. Shortest phase in the menstrual cycle of women is

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  14. Which of the following graphs shows the type of natural selection whic...

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  15. Which of the given pyramids represents the variation in biomass at dif...

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  16. Which of the following species is a primary consumer in the given food...

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  17. Penicillium does not allow the growth of Staphylococus bacterium and T...

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  18. Refer to the given figure showing different zones in a deep lake. In w...

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  19. Human chorionic gonadotropin is secreted by

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  20. Female plant is diploid and male plant is tetraploid. Find out the cor...

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