Isolation of DNA — Predicted 2026

AI-Predicted Question Angles for UPSC 2026

Based on trend analysis, current affairs, and recurring themes in Isolation of DNA.

Reagent Function and Specificity

high

NEET consistently tests the specific roles of reagents. Future questions are highly likely to ask about the function of less commonly emphasized reagents like EDTA in storage buffer, or the precise role of salts in precipitation. They might also present a scenario where a particular reagent is omitted and ask about the consequence, requiring a deep understanding of each component's contribution to DNA integrity and purity.

Comparative DNA Isolation from Different Sources

medium

While questions about cellulase for plant cells are common, future questions might delve deeper into the challenges of isolating DNA from specific sources like fungi (chitinase), blood (hemoglobin removal), or soil samples (humic acid contamination). This would test a more nuanced understanding of how the basic protocol is adapted for different biological matrices and their unique interfering substances.

Troubleshooting and Problem-Solving Scenarios

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Instead of direct recall, NEET could introduce scenario-based questions. For example, 'A student performed DNA isolation but found significant RNA contamination. What step might have been missed or performed incorrectly?' or 'Why might the DNA yield be low if the sample was vortexed vigorously?' These questions require applying conceptual knowledge to diagnose and solve practical issues, moving beyond rote memorization.