Karteikarten
AQA biology 10.1 haemoglobin
Karten in diesem Stapel (16)
- 1what is the primary structure of haemoglobin?four polypeptide chains
- 2what is the secondary structure of haemoglobin?each polypeptide chain is wound into a helix
- 3what is the tertiary structure of haemoglobin?each polypeptide chain is folded into a precise shape - an important factor in its ability to carry oxygen
- 4what is the quaternary structure of haemoglobin?-all four polypeptides are linked together to form an almost spherical molecule.
-each polypeptide is associated with a haem group. - 5what ion is contained within the haem group?ferrous ion (Fe2+)
- 6how many molecules can be combined to one haemoglobin molecule?4
- 7how many oxygen atoms can be combined on one haemoglobin?8 (because each oxygen molecule has 2 oxygen atoms)
- 8what is haemoglobins main role?to transport oxygen
- 9how is haemoglobin efficient at transporting oxygen?-readily associate with oxygen at the surface where gas exchange takes place
-readily dissociate from oxygen at the tissues that need it. - 10why are there different types of haemoglobin?high affinity - take oxygen easily and release less readily
low affinity - take up less easily and release readily - 11what type of haemoglobin would an organism living in an environment with little oxygen need?high affinity
- 12what type of haemoglobin would an organism with high metabolic rate need?low affinity provided there is sufficient oxygen in the air.
- 13what is the process called where haemoglobin combines with oxygen?loading or associating
- 14where does loading/associating happen in humans?the lungs
- 15what is the name of the process in which haemoglobin releases the oxygen?unloading or dissociating
- 16where does dissociation/unloading occur in humans?in the tissues
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- AS - Level AS Biology (unit 2 - 10. the variety of life) Karteikarten am AQA biology 10.1 haemoglobin, erstellt von Charlotte Hewson am 13/03/2015.
- Erstellt von
- Charlotte Hewson
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