A-LevelBiologyBiological molecules9700/12 · May/June 2010 · Q31 Mark
Which feature of haemoglobin makes it a globular protein?
AIt has four cross-linked polypeptide chains forming a quaternary structure.
BIt has hydrophobic groups on the inside and hydrophilic groups on the outside.
CIt has hydrophobic interactions and is insoluble in water.
DIt has polypeptide chains which are cross-linked to form sheets.
✓ Correct answer
B: It has hydrophobic groups on the inside and hydrophilic groups on the outside.
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