Plant Growth Regulators — Prelims Strategy

Prelims Strategy

To excel in NEET questions on Plant Growth Regulators, a systematic approach is essential. Firstly, create a concise table summarizing each of the five major PGRs (Auxins, Gibberellins, Cytokinins, Ethylene, Abscisic Acid) with columns for: Discovery, Chemical Nature, Key Physiological Effects (3-5 bullet points), and Important Applications/Examples.

Pay close attention to unique features, such as ethylene being gaseous or ABA being a stress hormone. For numerical problems (though rare), ensure you understand the quantitative aspects of hormone concentration effects, like the optimal auxin concentration for root vs.

shoot growth. Conceptual questions often involve identifying the correct hormone for a given physiological process or application. Trap options frequently involve interchanging the functions of different hormones or misattributing a specific effect to the wrong PGR.

For instance, confusing auxin's role in apical dominance with cytokinin's role in lateral bud growth is a common trap. Practice identifying antagonistic and synergistic interactions, as these are frequently tested.

Memorize specific examples like bolting in cabbage (GA), seedless fruits (auxin), and fruit ripening (ethylene). Regularly revise this table and focus on distinguishing between similar-sounding effects or applications.