- 1(current)
Q. No.Consider the two statements:
| Statement I: | Bt toxin is more environmentally friendly than synthetic pesticides. |
| Statement II: | Expression of Bt toxin gene in plants provide resistance of certain insects. |
| 1. | Statement I is correct and Statement II is incorrect |
| 2. | Both Statement I and Statement II are correct and Statement II explains Statement I |
| 3. | Both Statement I and Statement II are correct but Statement II does not explain Statement I |
| 4. | Statement I is incorrect and Statement II is correct |
Subtopic: Â Bt Crops |
Level 3: 35%-60%
Hints
Bt cotton is not:
| 1. | A GM plant |
| 2. | Insect resistant |
| 3. | A bacterial gene expressing system |
| 4. | Resistant to all pesticides |
Subtopic: Â Bt Crops |
 79%
Level 2: 60%+
Hints
A protoxin is:
| 1. | A primitive toxin | 2. | A denatured toxin |
| 3. | Toxin produced by protozoa | 4. | Inactive toxin |
Subtopic: Â Bt Crops |
 90%
Level 1: 80%+
Hints
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: Â Bt Crops |
 95%
Level 1: 80%+
Hints
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: Â Bt Crops |
 89%
Level 1: 80%+
Hints
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: Â Bt Crops |
 75%
Level 2: 60%+
Hints
Corn borer can be controlled by the proteins encoded by Bacillus thuringiensis gene:
| 1. | cryIAb | 2. | cryIAc |
| 3. | cryIIAb | 4. | cryIIIAc |
Subtopic: Â Bt Crops |
 81%
Level 1: 80%+
Hints
Consider the two statements:
| I: | Any Bt toxin gene isolated from Bacillus thuringiensis can be used to create GM crops resistant to all insects. |
| II: | Bt toxins do not have specificity for any insect groups. |
| 1. | Statement I is correct and Statement II is incorrect. |
| 2. | Both Statement I and Statement II are correct and Statement II explains Statement I. |
| 3. | Both Statement I and Statement II are correct but Statement II does not explain Statement I. |
| 4. | Both Statement I and Statement II are incorrect. |
Subtopic: Â Bt Crops |
 76%
Level 2: 60%+
Hints
- 1(current)
Q. No.
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