Pest Resistant Plants

Q.

Is gibberellic acid harmful to humans?

Q. Is there a way to minimise the use of fertilisers and chemicals so that their harmful effects on the environment are reduced?

Q. Insect pest resistant plant, developed by the introduction of genes of Bacillus thuringiensis is:

1. Flavr Savr tomato
2. Tobacco plant
3. Bt cotton
4. Golden rice

Q. Bt cotton variety that was developed by the introduction of toxin gene of Bacillus thuringiensis (Bt) is resistant to

1. Insect predators
2. Fungal diseases
3. Plant nematodes
4. Insect pests

Q. Biological control component is central to advanced agricultural production. Which of the following is used as a third-generation pesticide?

1. Pathogens
2. Pheromones
3. Insect repellents
4. Insect hormone analogues

Q.

What are the reasons for superbugs to be formed?

1. Increased use of antibiotics

2. Increased cultivation of pest and disease resistant crops

3. Decreased cultivation of herbicide resistant crops

4. Extensive use of antibiotic resistant genes in genetic engineering

Q. A farmer buys seeds of Pusa Komal. Which crop is he planning to cultivate in the coming agricultural season?

1. Chilli
2. Wheat
3. Cowpea
4. Cauliflower

Q. The first genetically modified plant was produced in the year 1982 was a

1. Potato plant
2. Tobacco plant
3. Maize plant
4. None of the above

Q. Which of the following crop is developed by mutation breeding, that is resistant to yellow mosaic virus and powdery mildew?

1. Mung bean
2. Okra
3. Chilli
4. Cow pea

Q. Potato got resistance to Phytopthora infestans from

1. Solanum demissum
2. Solanum acaule
3. Solanum spegazzini
4. Solanum stoloniferum

Q. The genetically-modified (GM) brinjal in India, has been developed for

1. Enhancing shelf life
2. Drought-resistance
3. Insect-resistance
4. Enhancing mineral content

Q. What are the Bt-crops? Describe their significance.

Q. Bt brinjal is an example of transgenic crops. In this, Bt refers to

1. Bacillus tuberculosis
2. Biotechnology
3. Beta carotene
4. Bacillus thuringiensis

Q. GM brinjal in India has been developed for resistance against

1. virus
2. bacteria
3. fungi
4. insects

Q. The genetically modified (GM) brinjal in India has been developed for:

1. Insect-resistance
2. Enhancing shelf life
3. Enhancing mineral content
4. Drought-resistance

Q. Name the source and the type of cry genes isolated from it for incorporation into crops by biotechnologists. Explain how have these genes brought beneficial changes in the genetically modified crops.

Q. Which is the most widely used vector for producing Bt crops?

Q. Cryoendotoxins obtained from Bacillus thuringiensis are effective against

1. Mosquitoes
2. Flies
3. Nematodes
4. Boll worms

Q. Which of the following is a mismatch regarding the transgenic plant and its application?

1. Tobacco $\Rightarrow$ Herbicide resistant
2. Flavr savr tomato $\Rightarrow$ Delay ripening
3. Golden rice $\Rightarrow$ Vitamin A enriched rice
4. Bt corn $\Rightarrow$ Resistant to nematode

Q. Co-varieties of sugarcane obtained red rot resistance from

1. S. arundinaceum
2. S. spontaneum
3. S. edula
4. Saccharum munja