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 Multiple Choice QuestionsMultiple Choice Questions

61.

In which stage of its life cycle, the silk moth begins to produce silk fibre?

  • 3rd instar larva

  • 4th instar larva

  • 5th instar larva

  • Pupa


62.

Which one of the following is the American poultry breed

  • Australop

  • Assel

  • Minorica

  • Rhod Island Red


63.

Transposons are

  • house-keeping genes

  • jumping genes

  • transporting genes

  • stationary genes


64.

First genetically modified plant commercially released in India is

  • golden rice

  • slow ripening tomato

  • Bt brinjal

  • Bt cotton


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65.

Cotton fibre is basically a type of

  • trichome

  • scale

  • dried seed coat

  • non glandular hair


66.

Biolistic technique is used in

  • tissue culture process

  • gene transfer process

  • hybridization process

  • germplasm conservation process


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67.

Which one of the following bacterium is used for production of transgenic plants

  • Escherichia coli

  • Bacillus thuringiensis

  • Staphylococcus aureus

  • Agrobacterium tumefaciens


D.

Agrobacterium tumefaciens

Transgenic plants are the plants that have been genetically engineered, a breeding approach that uses recombinant DNA techniques to create plants with new characteritics.

Plant cells do not have endogeneous plasmids. The plasmid vectors used for plant cell transformation are mostly based on Agrobacterium tumefaciens Ti plasmid. These are plant pathogenic Gram ve soil bacteria which cause crown gall disease of dicot plants.


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68.

Basic principle of developing transgenic plants and animals is to introduce the gene of interest into the nucleus of

  • somatic cell

  • vegetative cell

  • germ cell

  • body cell


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69.

Which of the following Bt crops is being grown in India by the farmers?

  • Maize

  • Cotton

  • Brinjal

  • Soyabean


70.

Insect pest resistant Bt cotton plant was developed using

  • somaclonal variation

  • micropropagation

  • somatic hybridisation

  • Transgenic technology


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