Why is haemoglobin described as a 'conjugated protein'?Question 7Select one:a.It contains more than one chain.b.It binds to oxygen.c.It is fixed to the cell membrane.d.It is not made entirely of amino acids.
Question
Why is haemoglobin described as a 'conjugated protein'?Question 7Select one:a.It contains more than one chain.b.It binds to oxygen.c.It is fixed to the cell membrane.d.It is not made entirely of amino acids.
Solution
Haemoglobin is described as a 'conjugated protein' because it is not made entirely of amino acids. Conjugated proteins are proteins that function in interaction with other chemical groups attached by covalent bonds or weak interactions. In the case of haemoglobin, it is a protein that carries a 'prosthetic group' called 'haem'. This haem group contains an iron atom which allows the binding of oxygen, but it is not an amino acid. Therefore, the correct answer is d. It is not made entirely of amino acids.
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