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Describe the structure of a molecule of hemoglobin and explain the role played by iron in the transport of oxygen?
Wiki User
∙ 11y ago
At normal temperature and pressure only 4 ml of oxygen is dissolved in one liter of water or plasma. So molecule of hemoglobin is designed by nature in such a way that, it contains 4 atoms of iron in it ( and so it carries 4 molecules of oxygen ) and have affinity for oxygen, large enough to hold it, when there is high concentration of oxygen, as in lung and small enough to let the oxygen go, where the concentration of oxygen falls down in interstitial compartment . That's the beauty of hemoglobin molecule. So blood can carry 70 times more oxygen than what water or plasma can do. It means about 280 ml / liter.
Wiki User
∙ 11y ago
Hemoglobin is a protein composed of four subunits, each containing a heme group with an iron atom at its center. Iron binds to oxygen molecules in the lungs, forming oxyhemoglobin. This complex then transports oxygen from the lungs to tissues throughout the body, where it is released for cellular respiration.
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A molecule of hemoglobin can hold how many molecules of oxygen in the blood transport?
One molecule of hemoglobin can hold up to four molecules of oxygen for transport in the blood.
How does the structure of hemoglobin help its function?
The structure of hemoglobin, with four protein subunits and heme groups, allows it to bind to and transport oxygen efficiently. The heme groups in each subunit bind to oxygen molecules, enabling hemoglobin to carry oxygen through the bloodstream to tissues and organs. Additionally, the quaternary structure of hemoglobin facilitates cooperative binding of oxygen, meaning that as one oxygen molecule is bound, it increases the affinity of the other subunits for oxygen.
Is the B subunit of the hemoglobin A molecule a complete DNA molecule?
B-subunit of the hemoglobin A molecule is not a complete DNA molecule. It contains 4 subunits
The molecule responsible for carrying oxygen through the human body is?
hemogoblin
How many haem molecules are attached to a polypeptide chain?
Typically, a single polypeptide chain in a hemoglobin molecule can bind to 4 heme molecules. Each heme molecule contains an iron atom that can bind to an oxygen molecule for transport in the bloodstream.
A fully functional molecule of hemoglobin is what kind of protein structure?
The structure of the hemoglobin in a molecule is the quaternary structure.
How many molecules of oxygen can be transported by one molecule of hemoglobin?
Each molecule of hemoglobin can transport up to four molecules of oxygen. Hemoglobin has four heme groups, each of which can bind to one molecule of oxygen.
Each hemoglobin molecule is able to transport molecules of oxygen.?
False. The mammalian hemoglobin molecule can bind (carry) up to four oxygen molecules.
A molecule of hemoglobin can hold how many molecules of oxygen in the blood transport?
One molecule of hemoglobin can hold up to four molecules of oxygen for transport in the blood.
What is the name of the thing in our blood that transport oxygen?
Red blood cells are packed full of a protein called hemoglobin. Hemoglobin has a molecule of iron in each protein molecule. This hemoglobin is what carries oxygen. The oxygen binds with the iron.
What is the length of hemoglobin molecule?
6.8*10-6mm is the length of a hemoglobin molecule
Which part o the hemoglobin molecule does carbon dioxide attach?
Carbon dioxide primarily binds to the globin part of the hemoglobin molecule, specifically to specific amino acid residues within the globin chains. This binding forms carbaminohemoglobin and plays a role in the transport of carbon dioxide from tissues to the lungs for elimination.
What happens when hemoglobin is degraded?
The part of the blood that is responsible for carrying oxygen is hemoglobin. The hemoglobin binds to oxygen in the alveoli of the lungs. Then the hemoglobin releases the oxygen at the cells. The part of the hemoglobin molecule that is directly responsible for carrying the oxygen is the iron ion in the center of the molecule's structure. The iron ion changes from a Fe +2 ion to a Fe +3 when carrying the oxygen. Then the hemoglobin reaches the cell, the iron ion decomposes back to the more stable Fe +2 state, replacing the oxygen with a water molecule.
What does hemoglobin contain that attracts the oxygen molecule?
Hemoglobin contains iron atoms that bind to oxygen molecules. This iron atom within the heme group forms a reversible bond with oxygen, allowing hemoglobin to efficiently transport oxygen throughout the body.
Is the B-subunit of the hemoglobin A molecule a complete DNA molecule?
No, the B-subunit of hemoglobin A is a protein subunit, not a DNA molecule. Hemoglobin is composed of four protein subunits (two alpha and two beta) that come together to form the hemoglobin molecule, which carries oxygen in red blood cells. The instructions for making these protein subunits are found in the DNA of our cells.
Is the B subunit of the hemoglobin A molecule a complete DNA molecule?
B-subunit of the hemoglobin A molecule is not a complete DNA molecule. It contains 4 subunits
What type of bond is present between oxygen and hemoglobin?
The bond between oxygen and hemoglobin is a reversible coordination bond formed between the iron atom in the heme group of hemoglobin and the oxygen molecule. This bond allows hemoglobin to transport oxygen from the lungs to tissues throughout the body.
