Virus, Viroids and Prions — Prelims Strategy

Prelims Strategy

To effectively tackle NEET questions on Viruses, Viroids, and Prions, a clear, comparative approach is essential. Firstly, create a mental or physical table comparing their key features: genetic material (DNA/RNA, ss/ds, presence/absence), protein coat (capsid presence/absence), size, host specificity, and mechanism of infection.

Memorize specific examples of diseases caused by each (e.g., HIV for viruses, PSTVd for viroids, BSE/CJD for prions). For numerical problems (though rare in this specific sub-topic, conceptual numericals on viral load or replication rates might appear in broader microbiology), focus on understanding the underlying biological principles rather than complex calculations.

Pay close attention to keywords like 'naked RNA', 'misfolded protein', 'obligate intracellular parasite', and 'acellular'. Trap options often involve interchanging characteristics between these three agents or confusing them with bacteria.

Always read the question carefully, especially words like 'all', 'only', 'never', which can make a statement incorrect. Practice identifying the incorrect statement among options, as this is a common question format.

For conceptual questions, apply your comparative knowledge to eliminate distractors systematically.