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 present in red blood cells and is an essential chemical which carries oxygen from lungs to other parts of the body. It is metalloprotein having quarternary structure which contains iron and performs the important function of transporting oxygen via RBCs in blood in mammals as well as other animals.he name hemoglobin is made from the blend of heme and globin. Globin is the globular protein in which heme-an iron atom is embedded which is the main chemical binding oxygen. The common type of hemoglobin consists of four subunits: 1  Two alpha (Î±) subunits or globins.