Biotechnological Applications in Agriculture — Prelims Strategy

Prelims Strategy

To excel in NEET questions on Biotechnological Applications in Agriculture, a multi-faceted strategy is essential. Firstly, focus on memorizing key examples and their specific details. For Bt cotton, remember the bacterium (*Bacillus thuringiensis*), the specific *cry* genes (*cryIAc*, *cryIIAb*), and the target pests (cotton bollworms).

For Golden Rice, recall the genes (*psy* from daffodil, *crtI* from *Erwinia uredovora*) and its purpose (Vitamin A deficiency). Secondly, understand the underlying mechanisms. Don't just rote learn that Bt cotton is pest-resistant; understand *how* the Bt toxin works in the insect gut (alkaline pH, receptor binding, pore formation).

Similarly, grasp how Golden Rice synthesizes beta-carotene. Thirdly, distinguish between different applications and their benefits. Be clear on what problem each GM crop solves (e.g., pest resistance vs.

nutritional enhancement vs. herbicide tolerance). Pay attention to common trap options that mix up genes, organisms, or purposes from different examples. Practice MCQs that test both direct recall and conceptual understanding.

For conceptual questions, break down the problem into its core biological principles. Always read all options carefully, as distractors are often plausible but incorrect biological facts or misattributions.