$Zn^{2+}$ activates which of the following enzymes?

Which of the following is not a macro-nutrient?

Match the following:

Column-$I$	Column-$II$
$(1)$ Nitrogen	$(p)$ Formation of mitotic spindle
$(2)$ Phosphorus	$(q)$ Protein,vitamins
$(3)$ Potassium	$(r)$ Phosphorylation reactions
$(4)$ Calcium	$(s)$ Maintain the turgidity of cells

How many of the following are microelements?
$Zn, P, Cu, Mg, K, Al, Ca, Mn, Mo, S, Fe$ etc.

The deficiencies of micronutrients not only affect the 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?

$S$ - Statement: Sulfur is present in the structure of cysteine and methionine amino acids.
$R$ - Reason: Phosphorus does not participate in energy exchange processes.