Nucleic Acids — Predicted 2026

AI-Predicted Question Angles for UPSC 2026

Based on trend analysis, current affairs, and recurring themes in Nucleic Acids.

Detailed structural identification of a nucleotide/nucleoside

high

NEET frequently tests the ability to identify the specific components (base, sugar, phosphate) and the bonds (N-glycosidic, ester) within a single nucleotide or nucleoside. A question might present a diagram of a nucleotide and ask to label its parts or identify a specific bond. Understanding the difference between ribose and deoxyribose at the 2' carbon is also a high-yield point, often tested visually or descriptively. This is a fundamental concept that can be easily framed into an MCQ.

Comparative analysis of DNA and RNA stability and reactivity

high

The difference in stability between DNA and RNA, primarily due to the presence/absence of the 2'-hydroxyl group in their respective sugars and their typical strandedness, is a crucial concept. Questions often probe why DNA is more stable or why RNA is more reactive. This requires a deeper understanding beyond just memorizing differences, linking structure to chemical properties, which is a favorite for NEET to test conceptual depth.

Application of Chargaff's rules in complex scenarios

medium

While basic Chargaff's rule calculations are common, a slightly more complex question might involve a partial sequence or a scenario where only one strand's base composition is given, and the student needs to deduce the entire molecule's composition or the complementary strand's composition. This tests not just recall but also the application of the rule in a multi-step problem. For example, given the percentage of (A+G) in one strand, calculate the percentage of (T+C) in the other strand.