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Nitrogen

'Nif' gene fo...

Question

'Nif' gene for nitrogen fixation in cereal crops like wheat, jowar etc. is introduced by cloning

A

Rhizobium meliloti

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B

Bacillus thuringiensis

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C

Rhizopus stolonifer

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D

Agrobacterium tumefaciens

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Solution

The correct option is B Rhizobium meliloti
Answer is option A i.e. "Rhizobium meliloti"
"Nif" genes encoding enzymes needed for nitrogen fixation i.e. nitrogenase enzyme complex. It is used in cereal crops like wheat, jowar etc. and introduced by cloning of nitrogen fixing bacteria like Rhizobium meliloti.

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Q. Crops like jowar, red gram etc. take a minimum of 180 days or more for harvesting. Such crops are called ___ .

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

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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 gene gets automatically transferred to the crop with which the bacterium is associated.

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