Haemoglobin transport

What is the structure of haemoglobin?

• Protein made up of four subunits with heme groups

• Carbohydrate made up of four subunits with heme groups

• Nucleic acid made up of four subunits with heme groups

• Lipid made up of four subunits with heme groups

Explain the function of haemoglobin in oxygen transport.

• Causes the breakdown of oxygen in the blood

• Facilitates the transport of oxygen in the blood

• Prevents the transport of oxygen in the blood

• Converts oxygen into carbon dioxide in the blood

What is the role of iron in haemoglobin?

• It helps in binding oxygen to haemoglobin.

• It is responsible for maintaining blood pressure.

• It has no role in haemoglobin function.

• It helps in carrying carbon dioxide in the blood.

Describe the concept of cooperative binding in haemoglobin.

• Cooperative binding in haemoglobin is not influenced by the binding of oxygen to one subunit.

• The binding of oxygen to one subunit of haemoglobin decreases the affinity of the remaining subunits for oxygen.

• The binding of oxygen to one subunit of haemoglobin has no effect on the affinity of the remaining subunits for oxygen.

• The binding of oxygen to one subunit of haemoglobin increases the affinity of the remaining subunits for oxygen.

How many heme groups are present in a single haemoglobin molecule?

• 4

• 2

• 6

• 8

What is the significance of the quaternary structure of haemoglobin?

• Cooperative binding of oxygen

• Enhanced carbon dioxide transport

• Increased blood clotting

• Decreased oxygen binding

How does haemoglobin's affinity for oxygen change with increasing oxygen concentration?

• Remains constant

• Increases

• Decreases

• Becomes unpredictable

Explain the Bohr effect in relation to haemoglobin's oxygen binding capacity.

• The Bohr effect is related to the temperature's effect on haemoglobin's oxygen binding capacity.

• The Bohr effect describes how pH and carbon dioxide levels affect haemoglobin's oxygen binding capacity.

• The Bohr effect is related to the size of the haemoglobin molecule and its oxygen binding capacity.

• The Bohr effect is related to the amount of iron in the haemoglobin molecule and its oxygen binding capacity.

What is the difference between oxyhemoglobin and deoxyhemoglobin?

• Color

• Oxygen binding

• Carbon dioxide binding

• Iron content

How does carbon monoxide poisoning affect the oxygen transport function of haemoglobin?

• It has no effect on the oxygen-carrying capacity of the blood.

• It increases the oxygen-carrying capacity of the blood.

• It reduces the oxygen-carrying capacity of the blood.

• It enhances the oxygen-carrying capacity of the blood.