3 Answers. In Great Britain today, the role of the queen is completely ceremonial. She (and whoever comes after her as monarch) has absolutely no actual power. In political science terms, she is the head of state for Great Britain but is not head of government.
Overview. 1  Oxygen-hemoglobin dissociation curve sigmoidal shape is characteristic of positive cooperativity binding of 1 O2 molecule to 1 subunit of deoxyhemoglobin increases affinity for O2 in adjacent subunits. P50 is PO2 at which hemoglobin is 50% saturated â P50 â â hemoglobin affinity for O2 50% saturation achieved at higher-than-normal P50.
Therefore, one molecule of hemoglobin can bind four molecules of oxygen. As each red blood cell contains about 280 million hemoglobin molecules, a single red blood cell can carry over 1 billion molecules of oxygen. Once again, that's a lot of oxygen! Cooperative Binding. Okay, so hemoglobin carries oxygen, but how does oxygen bind to hemoglobin? The way by which hemoglobin binds oxygen is referred to as cooperative binding. The binding of oxygen to hemoglobin makes it easier for more oxygen to bind. Let's consider an analogy.