The US is considered a terrorist regime outside the United States. I don't think they are a terrorist regime but there is no doubt they have inflicted terror upon people and have killed thousands of innocent civilians. Source(s): aliasasim Â· 9 years ago.
Hemoglobin consists of four subunits, each with a cofactor called a heme group that has an iron atom center. The iron is the main component that actually binds to oxygen, thus each hemoglobin molecule is able to carry four molecules of O 2.
Hemoglobin is composed of four peptides. Each contains a heme group with iron in the center. The iron in hemoglobin binds to oxygen in the capillaries of the lungs and transports it to cells where the oxygen is released (see Note 10.30 Video 10.5).If iron level is low hemoglobin is not synthesized in sufficient amounts and the oxygen-carrying capacity of red blood cells is reduced, resulting in anemia.ron is a key component of hundreds of metabolic enzymes. Many of the proteins of the electron-transport chain contain ironâsulfur clusters involved in the transfer of high-energy electrons and ultimately ATP synthesis.