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Increased yield of crop during the green revolution was due to:
| I. | Use of improved crop varieties |
| II. | Use of better management practices |
| III. | Use of agrochemicals [fertilisers and pesticides] |
| 1. | Only I | 2. | Only I and III |
| 3. | Only I and II | 4. | I, II and III |
Subtopic: Intro to Agri Applications |
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All the following are possible today with the use of GM crops except:
| 1. | More tolerance to abiotic stresses |
| 2. | Alternative resources to industries |
| 3. | Increased efficiency of mineral usage by plants |
| 4. | Fixation of atmospheric nitrogen |
Subtopic: Intro to Agri Applications |
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GM crops have been modified with various traits. Golden rice has been developed by the International Rice Research Institute for:
1. Improved shelf life
2. Disease resistance
3. Herbicide resistance
4. Improved nutritional value
1. Improved shelf life
2. Disease resistance
3. Herbicide resistance
4. Improved nutritional value
Subtopic: Other GM Crops |
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A protoxin is:
| 1. | A primitive toxin | 2. | A denatured toxin |
| 3. | Toxin produced by protozoa | 4. | Inactive toxin |
Subtopic: Bt Crops |
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The trigger for activation of toxin of Bacillus thuringiensis is:
| 1. | Acidic pH of stomach |
| 2. | High temperature |
| 3. | Alkaline pH of gut |
| 4. | Mechanical action in the insect gut |
Subtopic: Bt Crops |
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Bacillus thuringiensis (Bt) strains have been used to design novel:
1. Biofertilizers
2. Biometallurgic techniques
3. Biomineralization processes
4. Bioinsecticidal plants
1. Biofertilizers
2. Biometallurgic techniques
3. Biomineralization processes
4. Bioinsecticidal plants
Subtopic: Bt Crops |
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Why does the bacterium Bacillus thuringiensis not affected by the toxins produced by it that can kill arthropods?
| 1. | The toxin inactivated by proteins in the bacterial cells. |
| 2. | The bacterial cell does not have organelles and thus it is harmless. |
| 3. | It is produced as a pro-toxin by the bacterium. |
| 4. | The protein needs post-transcriptional modification possible only in eukaryotic cells. |
Subtopic: Bt Crops |
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Corn borer can be controlled by the proteins encoded by Bacillus thuringiensis gene:
| 1. | cryIAb | 2. | cryIAc |
| 3. | cryIIAb | 4. | cryIIIAc |
Subtopic: Bt Crops |
81%
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A transgenic tobacco plant was created to make it resistant to:
| 1. | a nematode, Meloidogyne incognita. |
| 2. | a nematode, Caenorhabditis elegans. |
| 3. | a trematode, Clonorchis sinensis. |
| 4. | a cestode, Taenia sloium. |
Subtopic: Interference RNA Tech |
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RNAi, as a mechanism of cellular defense, takes place in:
| 1. | All bacteria | 2. | All unicellular organisms |
| 3. | All plants only | 4. | All eukaryotic organisms |
Subtopic: Interference RNA Tech |
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