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  • 1(current)
Q. No.

A protoxin is:

1. A primitive toxin 2. A denatured toxin
3. Toxin produced by protozoa 4. Inactive toxin
Q1:
 90% From NCERT 
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

Q2:
 95% From NCERT 
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
Q3:
 89% From NCERT 
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.

Q4:
 78% From NCERT 
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
Q5:
 79% From NCERT 
Subtopic:  Bt Crops |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology
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