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Inside Bacillus thuringiensis the Bt toxin is stored as:

AOil droplets
BWater vacuoles
CProtein crystals
DStarch granules
Answer & Solution
Correct answer: C. Protein crystals
1. The toxin must not harm the bacterium itself. 2. It is laid down in an insoluble packed form. 3. That form is a protein crystal. _Source: NCERT Class 12 Biology, Ch 10 'Biotechnology and its Applications'_
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