A protoxin is:
1. | A primitive toxin | 2. | A denatured toxin |
3. | Toxin produced by protozoa | 4. | Inactive toxin |
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 |
Bacillus thuringiensis (Bt) strains have been used to design novel:
1. | Biofertilizers | 2. | Biometallurgic techniques |
3. | Biomineralization processes | 4. | Bioinsecticidal plants |
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. |
Corn borer can be controlled by the proteins encoded by Bacillus thuringiensis gene:
1. | cryIAb | 2. | cryIAc |
3. | cryIIAb | 4. | cryIIIAc |