Biology Unit 2

Structure of a haemoglobin molecule
Quaternary with 4 polypeptide chains each with a 'heam' group that contains iron which oxygen binds too.
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How many oxygen molecules can a heamoglobin molecule carry?
Four
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What is partial pressure of oxygen?
A measure of the concentration of oxygen.
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When does oxygen load onto heamoblobin?
When there is a high partial pressure of oxygen
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What is the Bohr effect?
Haemoglobin gives up its oxygen more readily at higher partial pressures of CO2 which moves the dissociation curve to the right.
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Why would the dissociation curve move to the left?
If there is a low concentration of oxygen, so the haemoglobin has a higher affinity for the oxygen.
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Other cards in this set

Card 2

Front

How many oxygen molecules can a heamoglobin molecule carry?

Back

Four

Card 3

Front

What is partial pressure of oxygen?

Back

Preview of the front of card 3

Card 4

Front

When does oxygen load onto heamoblobin?

Back

Preview of the front of card 4

Card 5

Front

What is the Bohr effect?

Back

Preview of the front of card 5
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