Which ELEMENT IS NOT required by ALL LIFE FORMS, Zinc (Zn) or Titanium (Ti)?
Titanium is not required in all life forms. Zinc is widely distributed throughout the body and plays an essential role in many body processes. Radioactive zinc given orally or intravenously reached peak concentrations in the liver within a few days, but concentrations in red blood cells, muscle, bone and hair do not peak for several weeks. Zinc is present in many enzyme systems that are concerned with the metabolism of feed constituents. For example, zinc is a constituent of carbonic anhydrase, carboxypeptidase A and B, several dehydrogenases, alkaline phosphatase, ribonuclease and DNA polymerase. Zinc is required for normal protein synthesis and metabolism, and it is also a component of insulin so that it functions in carbohydrate metabolism.