Haemoglobin AQA A-Level Biology

What is the chemical symbol of the iron containing haem group?

• Fe+

• Fe2+ 

• Fe3+

• Fe

How many polypeptide chains is a haemoglobin molecule made of?

• 1

• 2

• 3

• 4

Haemoglobin has a high affinity for oxygen in areas with a...

• High partial pressure of carbon dioxide

• High partial pressure of oxygen

• Low partial pressure of oxygen

• Low partial pressure of carbon dioxide

Dissociation of haemoglobin is its ability to...

• Unload its oxygen to tissues

• Become saturated with oxygen

• Keep hold of its oxygen

• All of the above...

What kind of protein structure does haemoglobin have?

• Primary

• Secondary

• Tertiary

• Quaternary

Foetal haemoglobin has a dissociation curve...

• The same as the normal curve

• To the left of the normal curve

• To the right of the normal curve

• Plateaus lower than the normal curve

An organism with a high metabolic rate has a dissociation curve...

• At a lower partial pressure than the normal curve

• The same as the normal curve

• To the left of the normal curve

• To the right of the normal curve

Tags

NGSS.HS-LS1-7

The Bohr effect is caused by...

• An increase in carbon dioxide, increasing the concentration of H+ ions, increasing acidity

• An decrease in carbon dioxide, increasing the concentration of H+ ions, increasing acidity

• An increase in carbon dioxide, increasing the concentration of H+ ions, decreasing acidity

• An decrease in carbon dioxide, decreasing the concentration of H+ ions, decreasing acidity

Tags

NGSS.HS-LS1-3

After the first molecule of oxygen binds to haemoglobin...

• The tertiary structure changes, revealing less oxygen binding sites

• The tertiary structure changes, revealing more oxygen binding sites

• The tertiary structure stays the same

• The tertiary structure changes, the protein is denatured

What is the advantage of the Bohr effect during intense exercise?

• Haemoglobin dissociates its oxygen more readily, as its affinity for oxygen decreases, providing more oxygen for an increase in aerobic respiration in muscle cells

• Haemoglobin dissociates its oxygen less readily, as its affinity for oxygen increases, providing less oxygen for an decrease in aerobic respiration in muscle cells

• Haemoglobin dissociates its oxygen more readily, as its affinity for oxygen increases , providing more oxygen for an increase in aerobic respiration in muscle cells

• Haemoglobin dissociates its oxygen less readily, as its affinity for oxygen decreases, providing more oxygen for an increase in aerobic respiration in muscle cells