Ncert Exercises & Solutions

Which one of the following roles is not characteristic of an essential element?

1.	is a component of biomolecules
2.	changing the chemistry of soil
3.	being a structural component of energy-related chemical compounds
4.	activation or inhibition of enzymes

Page 196, XI NCERT

changing the chemistry of soil, is not a characteristic role of essential elements. While essential elements can affect the chemistry of soil through their uptake and release by plants, their primary role is to support plant growth and development. Changes in soil chemistry can be caused by a variety of factors, including weathering, erosion, and human activities.

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