question_answer 11)

Which one of the following roles is not characteristic of an essential element? (a) being a component of biomolecules (b) changing the chemistry of soil (c) being a structural component of energy related chemical (d) activation or inhibition of enzymes  

Answer:

                (b) Changing the soil chemistry is not a role of the essential element. Whereas rest all are the characteristics of an essential element. These are directly involved in the metabolism of plants.