1-2 Questions | 4-8 Marks in NEET Mastering Mineral Nutrition: Formulas, Traps & Exam Strategy | ExamiFly
Mineral Nutrition explores how plants function as sophisticated metabolic bio-factories, absorbing inorganic ions from the soil solution to construct vital cellular machinery. Mastery over this chapter relies on understanding the essentiality criteria formulated by Arnon and Stout, distinguishing between macronutrients ($C, H, O, N, P, K, Ca, Mg, S$) required at $> 10\text{ mmole kg}^{-1}$ of dry matter and micronutrients ($Fe, Mn, Cu, Mo, Zn, B, Cl, Ni$) needed in trace amounts ($< 10\text{ mmole kg}^{-1}$). NEET frequently targets the exact physiological roles of ions (like $Mg^{2+}$ in chlorophyll rings and $Zn^{2+}$ in auxin synthesis), deficiency pathologies such as chlorosis vs necrosis, and the bio-energetics of nitrogen metabolism via the $Nitrogenase$ enzyme complex. Conceptual precision regarding mobile versus immobile elements prevents easy traps.
