Nucleic Acids — Predicted 2026

AI-Predicted Question Angles for UPSC 2026

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

Impact of 2'-OH group on RNA stability and function

high

The presence of the 2'-OH group in ribose (RNA) versus its absence in deoxyribose (DNA) is a fundamental chemical difference with significant biological implications for stability and reactivity. NEET often tests such core chemical distinctions and their functional consequences. Questions could ask why RNA is less stable or more reactive, or how this difference relates to its transient roles compared to DNA's role in long-term storage.

Detailed structural components and bond types in a nucleotide/polynucleotide

medium

While basic components are frequently tested, questions might delve deeper into the specific atoms involved in N-glycosidic bonds (e.g., N9 of purine, N1 of pyrimidine) or the exact linkage points for phosphodiester bonds (3'-OH to 5'-phosphate). Visual identification of these bonds in a diagram could also be a predicted question type, requiring a more precise understanding of the chemical structure.

Role of minor RNA types (snRNA, miRNA, siRNA)

low

While mRNA, tRNA, and rRNA are standard, NEET occasionally introduces questions on less common but functionally important RNA types like snRNA (splicing), miRNA, and siRNA (gene regulation). These might appear as 'match the following' or 'identify the function' questions, testing a broader knowledge of RNA diversity beyond the core three. This tests a student's depth of knowledge beyond the most common types.