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From which bacterium was the gene isolated and inserted into cotton to produce Bt cotton?
AEscherichia coli
BRhizobium leguminosarum
CBacillus thuringiensis
DVibrio cholerae
Answer & Solution
Correct answer: C. Bacillus thuringiensis
1. Bt cotton produces a toxin fatal to the bollworm.
2. The gene for this toxin was isolated from the bacterium Bacillus thuringiensis and put into the cotton genome.
3. Rhizobium is a biofertiliser microbe, while E. coli and Vibrio cholerae are linked to edible vaccine work, not the cotton toxin.
_Source: Balbharati (Maharashtra Board) Class 10 Science & Technology Part 2, Ch 8 "Cell Biology and Biotechnology", p.101_
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