BIOMOLECULES AND ENZYMES

Detailed explanation-1: -It is the iron atom that binds oxygen as the blood travels between the lungs and the tissues. There are four iron atoms in each molecule of hemoglobin, which accordingly can bind four molecules of oxygen. Globin consists of two linked pairs of polypeptide chains.

Detailed explanation-2: -Hemoglobin is a red cell protein that facilitates oxygen and carbon dioxide transport (Chapter 48). There are approximately 640 million molecules of hemoglobin in each red blood cell. Hemoglobin consists of four polypeptide chains (two and two chains).

Detailed explanation-3: -Hemoglobin is the most important component of red blood cells. It is composed of a protein called heme, which binds oxygen. In the lungs, oxygen is exchanged for carbon dioxide.

Detailed explanation-4: -Hemoglobin is a protein found in red blood cells. It contains iron, which allows it to transport oxygen. Each hemoglobin molecule can bind up to four oxygen molecules. This way, it can transport the oxygen from the lungs to the tissues that need it.

Detailed explanation-5: -Hemoglobin, or Hb, is a protein molecule found in red blood cells (erythrocytes) made of four subunits: two alpha subunits and two beta subunits (Figure 20.19). Each subunit surrounds a central heme group that contains iron and binds one oxygen molecule, allowing each hemoglobin molecule to bind four oxygen molecules.