Each hemoglobin molecule is made of four subunits, each containing a heme group that can bind one molecule of oxygen. Therefore, one molecule of hemoglobin can bind four molecules of oxygen. Oxyhemoglobin is hemoglobin bound by oxygen, and it gives oxygen-rich blood a red color.ach hemoglobin molecule is made of four subunits, each containing a heme group that can bind one molecule of oxygen. Therefore, one molecule of hemoglobin can bind four molecules of oxygen. Oxyhemoglobin is hemoglobin bound by oxygen, and it gives oxygen-rich blood a red color.
The Second Reich was Imperial Germany (1871-1918),  as unified by Bismarck in 1871.   Note. During the Weimar period (1919-33) the official name of  Germany was still Deutsches Reich..    ________     Hitler's regime was never officially known as the Third  Reich. The term was first discussed in 1923 by German historian  Arthur Moeller van den Bruck in his Book Das dritte Reich  (The Third Empire), which he hoped would soon come into beling.
1 Heiliges Roemisches RÃ¶misches, reich The Holy Roman, empire which lasted from the coronation Of Otto i as A Holy Roman emperor in 962 to, 1806 when it was dissolved during The Napoleonic;  warsn the case of the Hohenzollern Empire (1871â1918), the official name of the country was Deutsches Reich (German Realm), because formally the official position of its head of state, in the Constitution of the German Empire, was a  presidency  of a confederation of German states led by the King of Prussia.