Structure and Replication of Virus — Prelims Strategy

Prelims Strategy

To excel in NEET questions on virus structure and replication, a systematic approach is crucial. Firstly, thoroughly memorize the key terminology: virion, capsid, capsomere, nucleocapsid, envelope, prophage, lysogen.

Understand the function of each component. Secondly, focus on the classification of viruses based on their genetic material (DNA vs. RNA, ss vs. ds) and the presence or absence of an envelope. This helps in categorizing examples.

Thirdly, master the sequential steps of the general viral replication cycle: adsorption, penetration, uncoating, biosynthesis, assembly, and release. For each step, know what happens and why. Pay special attention to the differences between the lytic and lysogenic cycles of bacteriophages, as this is a common point of confusion.

For numerical problems (though rare), ensure you understand any given values or ratios if they appear. Trap options often involve mixing up characteristics of different viruses (e.g., TMV's structure with HIV's enzymes) or confusing viral processes with bacterial or eukaryotic cellular processes (e.

g., antibiotics for viruses, mitosis for viral replication). Always read the question carefully, identify keywords like 'INCORRECT' or 'NOT,' and eliminate obviously wrong options first. Drawing simple diagrams of viral structures and replication cycles during revision can significantly aid recall.