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Assertion : Agrobacterium tumefaciens is...

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 .

A

If both A and R are true and R is the correct explanation of A

B

If both A and R are true but R is not the correct explanation of A

C

If A is true and R is false

D

If both A and R are false

Text Solution

Verified by Experts

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

Agrobacterium tumefaciens : (I) has earned the name of natural genetic engineer for the bacterium (II) carries a vir gene which promotes insertion of T-DNA into host cell . (III) has been used to transfer genes for RNA interfer- ence in plants

Assertion : - Genetic variability is the root of any breeding programme. Reason :- Entire collection of plants and seeds having diverse alleles for all genes in a given crop is called germplasm collection.

Assertion: Genetic engineering is a quick and reliable technique for producing GM plants but is facing resistance from people Reason :It is facing resistance because it contains bacterial genes which may be toxic and causes allergy

Assertion : Leguminous plants are best preferred for rotation of crops. Reason : They have root nodules which possess nitrogen fixing bacterium Clostridium

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. Identify which of the following is not an advantage of GM crops?

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?

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