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Question: Answered & Verified by Expert
The protein haemoglobin found in humans can be described having a ___________ structure.
ChemistryBiomoleculesNEET
Options:
  • A primary
  • B secondary 
  • C tertiary 
  • D quaternary 
Solution:
2253 Upvotes Verified Answer
The correct answer is: quaternary 
When a protein is made up of two or more than two polypeptide held together variously than it form quaternary structure. Protein haemoglobin has quaternary structure as it is made up of 4 polypeptide or subunits. Two of these are identical to each other. Hence two subunits of alpha type and two subunits of beta type together constitutes the human haemoglobin molecule.

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