AS Biology Quiz: Transport of Oxygen & Carbon Dioxide

What is the primary function of haemoglobin in red blood cells?

• To transport oxygen

• To regulate blood pH

• To transport carbon dioxide

• To produce energy

How many oxygen molecules can one molecule of haemoglobin carry?

• Two

• Five

• Four

• Three

What is formed when oxygen binds to haemoglobin?

• Deoxyhaemoglobin

• Hydrogen carbonate

• Oxyhaemoglobin

• Carbaminohaemoglobin

What is the chloride shift?

• Movement of hydrogen ions into plasma

• Movement of chloride ions into red blood cells

• Movement of oxygen into red blood cells

• Movement of carbon dioxide out of red blood cells

What percentage of carbon dioxide is transported in the blood plasma as hydrogen carbonate ions?

• 50%

• 85%

• 10%

• 5%

What enzyme catalyzes the formation of carbonic acid from carbon dioxide and water?

• Hemoglobinase

• Oxygenase

• Hydrolase

• Carbonic anhydrase

What does the oxygen dissociation curve illustrate?

• The pH levels in blood

• The concentration of haemoglobin in blood

• The rate of oxygen binding and dissociating with haemoglobin

• The rate of carbon dioxide transport

What happens to haemoglobin's affinity for oxygen in the presence of high carbon dioxide levels?

• It decreases

• It becomes unstable

• It increases

• It remains the same

What is the shape of the oxygen dissociation curve for haemoglobin?

• Sigmoidal

• Linear

• Circular

• Exponential

What is the effect of the Bohr shift on the oxygen dissociation curve?

• It becomes flat

• It shifts to the right

• It becomes vertical

• It shifts to the left