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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


67.

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

  • Escherichia coli

  • Bacillus thuringiensis

  • Staphylococcus aureus

  • Agrobacterium tumefaciens


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


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70.

Insect pest resistant Bt cotton plant was developed using

  • somaclonal variation

  • micropropagation

  • somatic hybridisation

  • Transgenic technology


D.

Transgenic technology

Bt cotton is a genetically modified variety of cotton producing an insecticide. It was developed by inserting Cry gene coding for Bt toxin into cotton plant genome by using transgenic technology causing cotton to produce this natural insecticide in its tissues. It was obtained from Bacillus thuringiensis. Techniques such as somaclonal variation, somatic hybridisation and micropropagation are the methods that rely as tissue culture techniques of producing plants by using different plant parts. They does not involve the gene level transfer.


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