What does each haemoglobin molecule consist of?
3 polypeptides and a haem group
An iron molecule
4 polypeptides and a haem group (with an iron molecule in)
Does the haem group have an affinity for oxygen?
Yes
No
How many oxygen molecules can each haemoglobin molecule hold?
2
4
8
Why do cells in the body tissues need oxygen?
anaerobic respiration
aerobic respiration
they don't
What does the ability of Hb to take up and release O2 depend on?
Oxygen tension
type of respiration
What shape would you expect an oxyhaemoglobin dissociation graph to be?
n
S
U
directly proportional to one another
What is the change in shape of the Hb molecule known as?
Conformational Change
Change of shape
Denaturation
Where do RBC's 'pick up' oxygen?
Lungs
Body tissues
Which part of the Hb molecule binds to the Oxygen?
Iron in the Haem group
an alpha polypeptide chain
Haem in the iron group
The haemoglobin of a mammalian fetus has a lower affinity for oxygen than that of adult haemoglobin