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A standard, biologically highly functional mammalian hemoglobin molecule structurally exists as a maBiomolecules Chemistry Question

Question

A standard, biologically highly functional mammalian hemoglobin molecule structurally exists as a massive aggregate of multiple distinct polypeptide subunits. Precisely how many individual, wholly independent continuous polypeptide chains successfully combine to successfully form one complete, functional hemoglobin quaternary tetramer?

Answer: C

💡 Solution & Explanation

The hallmark quaternary structure explicitly describes the complex 3D aggregation of multiple independent folded subunits. A standard functional human hemoglobin molecule is a massive protein tetramer meticulously composed of exactly four discrete non-covalently linked subunits: two identical $\alpha$ -chains and two identical $\beta$ -chains.

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