Bt cotton variety that was developed by the introduction of toxin gene of Bacillus thuringiensis (Bt) is resistant to (a) insect pests (b) fungal diseases (c) plant nematodes (d) insect predators.

Bt cotton variety that was developed by the
introduction of toxin gene of Bacillus thuringiensis
(Bt) is resistant to
(a) insect pests (b) fungal diseases
(c) plant nematodes (d) insect predators.
by

1 Answer

Answer :

(a) insect pests
by

Related questions

Bacillus thuringiensis forms protein crystals which contain insecticidal protein. This protein (a) binds with epithelial cells of midgut of the insect pest ultimately killing it (b) is coded by several genes including the gene cry (c) is activated by acid pH of the foregut of the insect pest (d) does not kill the carrier bacterium which is itself resistant to this toxin.

Description : Bacillus thuringiensis forms protein crystals which contain insecticidal protein. This protein (a) binds with epithelial cells of midgut of the insect pest ultimately killing it (b) is coded by several ... pest (d) does not kill the carrier bacterium which is itself resistant to this toxin.

Last Answer : (a) binds with epithelial cells of midgut of the insect pest ultimately killing it

Which of the following is true for Golden rice? (a) It has yellow grains, because of a gene introduced from a primitive variety of rice. (b) It is vitamin A enriched, with a gene from daffodil. (c) It is pest resistant, with a gene from Bacillus thuringiensis. (d) It is drought tolerant, developed using Agrobacterium vector.

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Last Answer : (b) It is vitamin A enriched, with a gene from daffodil.

Match the following columns and select the correct option. Column-I Column-II (A) Bt cotton (i) Gene therapy (B) Adenosine (ii) Cellular defence deaminase deficiency (C) RNAi (iii) Detection of HIV infection (D) PCR (iv) Bacillus thuringiensis (A) (B) (C) (D) (a) (iv) (i) (ii) (iii) (b) (iii) (ii) (i) (iv) (c) (ii) (iii) (iv) (i) (d) (i) (ii) (iii) (iv)

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Last Answer : (a) (iv) (i) (ii) (iii)

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Last Answer : (d) The inactive protoxin gets converted into active form in the insect gut.

An improved variety of transgenic basmati rice (a) does not require chemical fertilizers and growth hormones (b) gives high yield and is rich in vitamin A (c) is completely resistant to all insect pests and diseases of paddy (d) gives high yield but has no characteristic aroma.

Description : An improved variety of transgenic basmati rice (a) does not require chemical fertilizers and growth hormones (b) gives high yield and is rich in vitamin A (c) is completely resistant to all insect pests and diseases of paddy (d) gives high yield but has no characteristic aroma.

Last Answer : (b) gives high yield and is rich in vitamin A

Asseriton: Insect resistant transgenic cotton has been produced by inserting Bt gene Reason The Bt gene is derived form a bacterium

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In Bt cotton, the Bt toxin present in plant tissue as protoxin is converted into active toxin due to(a) action of gut microorganisms (b) presence of conversion factors in insect gut (c) alkaline pH of the insect gut (d) acidic pH of the insect gut.

Description : In Bt cotton, the Bt toxin present in plant tissue as protoxin is converted into active toxin due to (a) action of gut microorganisms (b) presence of conversion factors in insect gut (c) alkaline pH of the insect gut (d) acidic pH of the insect gut.

Last Answer : (c) alkaline pH of the insect gut

Which one of the following is an example of carrying out biological control of pests/diseases using microbes? (a) Trichoderma sp. against certain plant pathogens. (b) Nucleopolyhedrovirus against white rust in Brassica. (c) Bt-cotton to increase cotton yield. (d) Lady bird beetle against aphids in mustard.

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Last Answer : (a) Trichoderma sp. against certain plant pathogens.

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Last Answer : (2) Trichoderma sp. against certain plant pathgens

Cry I endotoxins obtained from Bacillus thuringiensis are effective against (a) nematodes (b) bollworms (c) mosquitoes (d) flies.

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Last Answer : b) bollworms

What triggers activation of protoxin to active toxin of Bacillus thuringiensis in bollworm? (a) Acidic pH of stomach (b) Body temperature (c) Moist surface of midgut (d) Alkaline pH of gut

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Last Answer : (d) Alkaline pH of gut

Bacillus thuringiensis (Bt) strains have been used for designing novel (a) biofertilizers (b) bio-metallurgical techniques (c) bio-mineralization processes (d) bioinsecticidal plants.

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Last Answer : (d) bioinsecticidal plants.

. A common biocontrol agent for the control of plant diseases is (a) baculovirus (b) Bacillus thuringiensis (c) Glomus (d) Trichoderma.

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Bt cotton is resistant to bollworm, it is due to (a) Bt is repellent to bollworm(b) Bt is contact poison for bollworm (c) Bt is stomach poison; it changes the permeability of stomach due to generation of pores in alkaline environment of stomach (d) Bt is causing death due to asphagsiation of insect

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Last Answer : (c) Bt is stomach poison; it changes the permeability of stomach due to generation of pores in alkaline environment of stomach

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Last Answer : (d) high yield and resistance to bollworms.

In bio fortification technique plant breeders use breeding to overcome (1) Loss due to insect pests (2) Decrease in food production (3) Deficiencies of micronutrients and vitamins (4) Loss due to plant diseases

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Last Answer : Deficiencies of micronutrients and vitamins

Bt cotton is resistant against the pest

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Last Answer : Ans.Helicoverpa (Spotted bollworm) 19. Jute

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Last Answer : answer:

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Last Answer : (a) insecticide

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Bacillus thuringiensis is used to control

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Last Answer : answer:

Bt” toxin is :

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What does bt stand for why would someone want this gene in a crop plant?

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Cultivation of Bt Cotton has been much in the news . The prefix "Bt" means

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Bt cotton is

Description : Bt cotton is

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Bt genes are introduced in cotton against the pest

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Last Answer : Ans. Cotton Bollworm

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Write a note on BT Cotton.

Description : Write a note on BT Cotton.

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Last Answer : (c) B and C only

The area under Bt – cotton in India is about (A) 6.4 mha (B) 5.4 mha (C) 4.4 mha (D) 3.4 mha

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Last Answer : (A) 6.4 mha

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Last Answer : b. 2002

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Description : Bt seed is associated with (1) Rice (2) Wheat (3) Cotton (4) Oil seeds

Last Answer : Cotton