Bt Cotton

Q.

Bt cotton variety that was developed by the introduction of toxin gene of Bacillus thuringiensis Bt is resistant to:

1. Plant nematodes

2. Insect predators

3. Insect pests

4. Fungal diseases

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

1. Maize
2. Cotton
3. Soybean
4. Ground gram

Q. Bt in Bt cotton stands for:

1. Biotechnology
2. Bollworm toxin
3. Bacterial tolerant
4. Bacillus thuringiensis

Q.

What Produces Bt Toxin?

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

1. Brinjal
2. Soybean
3. Maize
4. Cotton

Q. CryⅠAc and CryⅡAb endotoxins obtained from Bacillus thuringiensis are effective against

1. corn borers
2. nematodes
3. cotton bollworms
4. rust fungi

Q. Bt cotton/Bt toxin is not

1. a GM plant
2. insect resistant
3. obtain from bacterial gene
4. resistant to all pesticides

Q. Assertion :Insect resistant transgenic cotton has been produced by inserting Bt gene. Reason: The Bt gene is derived from a bacterium.

1. Both A and R are true but R is the correct explanation of A
2. Both A and R are true but R is not a correct explanation of A
3. A is true but R is false
4. A is false but R is true

Q. Bacillus thuringiensis is a

1. Bacterium
2. Bioherbicide
3. Bio fertilizer
4. None of the above

Q. Bt in Bt cotton stands for:

1. Biotechnology
2. Bollworm toxin
3. Bacterial tolerant
4. Bacillus thuringiensis

Q. Assertion :A gene from Bacillus thuringiensis is incorporated in plant genome to increase yield Reason: It is Bt toxin producing gene which kills larvae of insects

1. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
2. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
3. Assertion is correct but Reason is incorrect
4. Both Assertion and Reason are incorrect

Q.

"Bt cotton" is resistant to:

1. Insects

2. Herbicides

3. Salt

4. Drought

Q. Bt cotton is resistant to _______

1. Frogs
2. Bollworms
3. Nematodes
4. Houseflies

Q. The first genetically modified plant commercially released India is

1. Golden rice
2. Slow ripening tomato
3. Bt brinjal
4. Bt cotton

Q. Which genes are incorporated in cotton to protect from cotton bollworms?

1. cryIAc and cryIAb
2. cryIIAc and cryIIAb
3. cryIAc and cryIIAb
4. cryIIAc and cryIAb

Q. How is Bt cotton made to attain resistance against bollworm?

Q. Which one of the following statements is wrong in relation to transgenic Bt cotton plant?

1. Crop yield loss due to attack by Bacillus thuringiensis bacterium is reduced
2. Crop yield loss due to attack by lepidopteran insect pests is reduced
3. The use of chemical insecticides in the cotton field is minimized
4. Better quality cotton is produced

Q. Bt cotton is resistant to

1. insects
2. herbicides
3. salt
4. drought

Q. Insect-resistant transgenic cotton has been produced by inserting a piece of DNA from:

1. A virus
2. A bacterium
3. A wild relative of cotton
4. An insect

Q. Give a brief account of Bt cotton.

Q. Give a brief account of Bt-cotton.

Q. "One of the applications of biotechnology is the production of insect resistant crop plants." Justify the statement with reference to Bt-cotton.

Q. Cry protein is obtained from

1. Bacillus thuringiensis
2. Bacillus subtilis
3. Clostridium welchii
4. Escherichia coli

Q. What are Cry-proteins? Name an organism that produces it. How has man exploited this protein to his benefit?

Q. The genetically engineered crop, which has been recently introduced in India is

1. Herbicide tolerant maize
2. Bt cotton
3. Slow ripening tomato
4. Golden rice

Q. Isolation of Bt gene from bacterium (Bacillus thuringiensis) was taken up in which year?

1. 1977
2. 1980
3. 1997
4. 1990

Q. Which one is wrong in relation to transgenic Bt cotton plant ____________________.

1. Better quality cotton is produced
2. Crop yield loss due to attack by Bacillus thuringiensis bacterium is reduced
3. Crop yield loss due to attack by lepidopteran insect pest is reduced
4. Use of chemical insecticides in the cotton field is minimised

Q. Bt cotton genes repel

1. Bacterial pathogens
2. Fungal pathogens
3. Nematode parasites
4. Insect pests

Q. Which statement is correct about Bt cotton :-

1. Contains a gene from jelly fish which makes it to glow in dark
2. It contains a gene from Bacillus bacteria which is not useful to plants
3. It contains a gene from Bacillus bacteria which kill the pests
4. It contains a gene from Bacillus bacteria which kill other plants

Q. Cultivation of Bt cotton has been much in the news. The prefix Bt stands for

1. barium-treated cotton seeds
2. bigger thread variety of cotton with better tensile strength
3. produced by biotechnology using restriction enzymes and ligases
4. carrying an endotoxin gene from Bacillus thuringiensis