Question
Biology Question on Nutrition
Which one of the following elements is almost non- essential for plants?
A
Zn
B
Na
C
Ca
D
Mo.
Answer
Na
Explanation
Solution
The 16 elements necessary for plants called Mineral Nutrition 173 essential elements, are as : C, H, O, N, P, S, K, Mg, Ca, Fe, Cu, B, Zn, Mn, Mo and Cl. Zn is essential for the synthesis of tryptophan amino acid. Ca is the part of middle lamella, it stabilizes the structure of chromosomes. Mo is responsible for nodulation in legumes. It is a part of nitrate reductase enzyme which helps in nitrogen fixation. Na is a non-essential element. It seems to be involved in membrane permeability but its essentiality has not been proved.