Mineral Nutrition Question 27
27. The deficiencies of micronutrients, not only affects growth of plants but also vital functions such as photosynthetic and mitochondrial electron flow. Among the list given below, which group of three elements shall affect most, both photosynthetic and mitochondrial electron transport:
[2005]
(a) $Co, Ni, Mo$
(b) $Ca, K, Na$
(c) $Mn, Co, Ca$
(d) $Cu, Mn, Fe$
Show Answer
Answer : d
Hints & Solution
(d) Copper : Electron transfer
$\left(\mathrm{Cu}^{+} \rightleftharpoons \mathrm{Cu}^{2+}\right)$
Maintenance of carbohydrate / nitrogen balance, chlorophyll synthesis. Iron : Electron transport in photosynthesis and respirations $\left(\mathrm{Fe}^{2+} \rightleftharpoons \mathrm{Fe}^{3+}\right)$ development of chloroplasts, chlorophyll and other pigments, protein synthesis. Manganese : Metabolism and photolytic evolution of oxygen.
