Bt Cotton and Pest Resistant Plants — Predicted 2026

AI-Predicted Question Angles for UPSC 2026

Based on trend analysis, current affairs, and recurring themes in Bt Cotton and Pest Resistant Plants.

Mechanism of Bt Toxin Activation and Specificity

high

This is the core scientific principle behind Bt cotton. Questions frequently test the conversion of protoxin to active toxin, the role of alkaline pH, and the specific binding to midgut receptors. A deep understanding of why it's harmful to insects but safe for humans is a recurring theme. Expect MCQs asking to identify the correct sequence of events or the primary reason for its specificity.

RNAi Mechanism and Nematode Resistance

high

RNA interference is another key biotechnological application for pest resistance, specifically against nematodes like *Meloidogyne incognita*. Questions often differentiate this mechanism from Bt technology, focusing on the role of double-stranded RNA and gene silencing. Understanding the steps involved in making a plant nematode-resistant using RNAi is crucial for NEET.

Comparison of Bt Cotton with Conventional Methods and Benefits/Concerns

medium

NEET often includes questions that evaluate the broader implications of biotechnology. Expect questions comparing Bt cotton's advantages (reduced pesticide use, increased yield, environmental benefits) with conventional chemical pest control. Potential concerns like pest resistance development or impact on non-target organisms might also be tested, requiring a balanced understanding of the topic.

Specific Genes, Pests, and Vectors

medium

Factual recall questions are always a part of NEET. Identifying the specific *cry* genes (*cryIAc*, *cryIIAb*), the target pests (lepidopterans/bollworms), and the vector used for plant transformation (*Agrobacterium tumefaciens*) are common. These questions test direct knowledge and are usually straightforward if the facts are memorized.