The major role of minor elements inside living organisms is to act as
(a) co-factors of enzymes
(b) building blocks of important amino acids
(c) constituent of hormones
(d) binder of cell structure
Answer:(a) co-factors of enzymes
Minor element are those which are required in quantity of less than milligram/gram of dry matter but they are essential for proper growth and development of an organism e.g., CI, Mn, B, Zn, Cu, Mo etc.These elements work as non-protein cofactor in enzymes.They also take part in oxidation reduction reactions eg. Cu, with variable valency. Chloride ion enhances activity of salivary amylase. Zinc is required for activity of carbonic anhydrase and alcohol dehydrogenase, etc.
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