what role do they play biologically?
It is an essential trace element for humans and other animals, for plants and for microorganisms.
Zinc
Zinc is an essential trace element for humans and other animals, for plants and for microorganisms.
which group on the periodic table contains magnesium Group 2 what is group 12 element? It is a group of chemical elements in the periodic table which includes  zinc (Zn), cadmium (Cd) and mercury (Hg) what are the physical properties of the element which is denoted as zn? It is a bluish-white, lustrous, diamagnetic metal, though most common commercial grades of the metal have a dull finish
wiki:19606514
Zinc [SEP] Biological role
Zinc is an essential trace element for humans and other animals, for plants and for microorganisms. Zinc is required for the function of over 300 enzymes and 1000 transcription factors, and is stored and transferred in metallothioneins. It is the second most abundant trace metal in humans after iron and it is the only metal which appears in all enzyme classes. In proteins, zinc ions are often coordinated to the amino acid side chains of aspartic acid, glutamic acid, cysteine and histidine. The theoretical and computational description of this zinc binding in proteins (as well as that of other transition metals) is difficult.