_____ are the essential elements not categorised as Biomolecules, but still play a pivotal key role in biological process.
Minerals are the essential elements which play a key role in biological processes; like enzymatic activity, construction of bones and teeth, transport of oxygen etc. Based on their size and acid solubility, they are considered as micromolecules.
If the quantity of requirement of a particular mineral is more than 100-150 mg per day, then they are considered as macronutrients or major minerals. There are 7 elements that meet this criteria for humans.They include Sodium, Potassium, Calcium, Magnesium, Phosphorus, Sulphur and Chloride.
If the quantity of requirement is less than 1 mg per day, then they are considered as micronutrients or trace elements or minor minerals. There are 14 elements that meet this criteria in humans. They include Iron, Manganese, Zinc, Iodine, Fluorine, Selenium, Cobalt, Molybdenum, Copper, Chromium, Nickel, Barium, Lithium and Bromine.