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 a molecule which is consist of 4 HEM groups and a protein named globin. Major duity of hemoglobin is to transfer CO2 and O2 between the tissues and the blood, bu â¦ t those are not the only molecules that can bind to hemoglobin.