2 interactive concept widgets for Biotechnology and Its Applications. Drag any slider, change any number, and watch the formula and the answer update live. Built so you understand how each NEET problem actually works, not just the final number.
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Step through the 6-stage Bt toxin mechanism (ingestion, alkaline solubilisation, protease activation, receptor binding, pore formation, cell lysis). Compare Bt cotton, Bt corn, golden rice, and herbicide-tolerant soy in a side-by-side table.
Step through the Bt toxin mechanism and compare GM crop types. Click each step to see what happens inside the insect gut.
Click any step to expand the explanation:
Why is Bt toxin safe for humans?
Bt cotton
| Transgene(s) | cry1Ac, cry2Ab |
| Target pest/purpose | American bollworm (Helicoverpa armigera) |
| Target insect order | Lepidoptera |
| Commercial brand | Bollgard II (Monsanto) |
Reduces pesticide sprays by 40 to 80%; protects yield
Secondary pests (sucking insects) not controlled; resistance management needed
| Crop | Key gene | Purpose | Pest/target order |
|---|---|---|---|
| Bt cotton | cry1Ac | Pest resistance | Lepidoptera |
| Bt corn | cry1Ab | Pest resistance | Lepidoptera |
| Herbicide-tolerant soy | aroA (mutant EPSP synthase) | herbicide tolerance, not pest resistance | N/A |
| Golden rice | Psy (phytoene synthase) | nutritional enrichment, not pest resistance | N/A |
12-question scored quiz covering Bt cotton cry genes, Bt toxin safety, RNAi mechanism, golden rice transgenes, herbicide-tolerant crops, ADA gene therapy, recombinant insulin, ELISA, PCR diagnosis, and biopiracy.
12 NEET-style questions on Bt crops, RNAi, gene therapy, ELISA, and bioethics.
Bt toxin is produced as an inactive protoxin in Bacillus thuringiensis. It becomes active when:
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