Transport Across Membrane — Predicted 2026

AI-Predicted Question Angles for UPSC 2026

Based on trend analysis, current affairs, and recurring themes in Transport Across Membrane.

Scenario-based questions on osmotic effects.

high

Osmosis and its implications (isotonic, hypotonic, hypertonic solutions, plasmolysis, turgor, hemolysis) are fundamental and frequently tested. NEET often presents scenarios involving cells placed in different solutions and asks about the outcome. This tests conceptual understanding and application rather than just recall. Expect questions comparing effects on plant vs. animal cells, or quantitative aspects related to water potential.

Distinguishing between primary and secondary active transport.

medium

While the Na$^+$/K$^+$ pump (primary active) is a classic, questions often try to trick students into confusing it with secondary active transport (e.g., Na$^+$-glucose symporter). Questions might focus on the direct vs. indirect use of ATP or the specific ion gradients involved. Understanding the energy coupling mechanism is key here. Expect questions that describe a process and ask to identify if it's primary or secondary active transport.

Impact of inhibitors on specific transport mechanisms.

medium

Questions involving metabolic poisons or specific inhibitors (e.g., ouabain for Na$^+$/K$^+$ pump, phlorizin for SGLT) test a deeper understanding of the mechanism. If ATP production is blocked, which processes are affected? This requires students to trace the energy dependence of various transport types, including the indirect dependence of secondary active transport on primary active transport. This is a good way to differentiate strong candidates.

Role of specific membrane proteins in transport.

high

NEET often focuses on the function of specific proteins. Questions could ask about aquaporins in water transport, GLUT transporters in glucose facilitated diffusion, or specific ion channels. Understanding the structure-function relationship of these proteins in facilitating or actively transporting substances is crucial. Expect questions identifying the protein involved in a given transport process.