1. what is meant by the term Quaternary structure
- a protein structure that consists of alpha helix's
- Protein structure where a protein consists of more than one polypeptide chain.
- a sequence of amino acids
- a protein structure that consists of only one polypeptide chain
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2. what is the function of haemoglobin?
- to carry oxygen from the lungs to the tissues
- to increase the water potentional within the blood vessels
- to provide energy to muscles
- to regulate temperature
3. what is the function of collagen?
- there is no particular function
- to carry out metabolic activities
- to provide mechanical strength in many areas
- to hold the body together
4. how many oxygen molecules can bind to haemoglobin?
5. describe one difference between the structure of haemoglobin and collagen
- there are no differences between the two
- Haemoglobin is insoluble in water whereas collagen is soluble in water
- Haemoglobin contains a prosthetic group whereas collagen does not have a prosthetic group
- one is a protein and one is a carbohydrate