7.1- Haemoglobin 4.0 / 5 based on 1 rating ? BiologyMass transportASAQA Created by: Megan2413Created on: 11-03-17 17:10 Does Haemoglobin have a quaternary structure? Yes 1 of 24 How many polypeptide chains does Haemoglobin contain? Four 2 of 24 What are the types of polypeptide chain a haemoglobin molecule contains? Alpha and beta 3 of 24 What type of group does each polypeptide have associated with it? Haem group 4 of 24 What do Haemoglobin molecules contain that give blood its colour? A red pigment 5 of 24 What is the primary structure? A sequence of amino acids in the four polypeptide chains 6 of 24 What is the secondary structure? Each polypeptide chain is coiled intoan alpha helix 7 of 24 What is the tertiary structure? The 3D shape that the polypeptide chain is again folded into 8 of 24 What is the quaternary structure? All four polypeptide chains linked together to form an almost spherical molecule 9 of 24 What ion does each haem group contain? Fe2+ ion 10 of 24 What does the Fe2+ ion do? It associates with an oxygen molecule 11 of 24 How many oxygen molecules can a single Haemoglobin molecule carry at a time? Four- one with each haem group 12 of 24 What is the association of oxygen? The process by which haemoglobin binds with oxygen 13 of 24 Where does association of oxygen take place in humans? In the lungs 14 of 24 What is the opposite process of association? Dissociation 15 of 24 Which terms can also mean association/dissociation? Loading/Unloading 16 of 24 Haemoglobin with a high affinity for oxygen takes it up more or less easily? More easily 17 of 24 If haemoglobin has a high affinity for oxygen, does it unload it easily or not? Doesn't unload oxygen easily 18 of 24 For haemoglobin to be effective it must.... Associate easily with oxygen at exchange surfaces and dissociate easily with oxygen at tissues 19 of 24 What can haemoglobin do under different conditions and why? Change its affinity for oxygen due to a change in shape 20 of 24 When there is a low concentration of CO2, the affinity for oxygen is ? High 21 of 24 When there is a high concentration of CO2, the affinity for oxygen is ? Low 22 of 24 The concentration of CO2 is high at the ? tissues 23 of 24 Why are there different haemoglobin molecules in different species? They contain a slightly different amino acid sequence, hence different tertiary and quaternary structures affecting the oxygen binding properties 24 of 24
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