....... activates various enzymes,especially carboxylases.

$P$: Copper is a structural component of amino acids.
$Q$: Manganese is a cofactor for the activity of enzymes like phosphatase.

Which of the following statements is associated with manganese $(Mn^{2+})$?

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?

Which of the following is required for the binding of proteins with nucleic acids?

Name the minerals responsible for maintaining cation-anion balance in the plant cells.