Practice question
Question
A sample of a homo-multimeric protein containing one atom of iron per polypeptide which amounts to 0.56% by weight. Gel filtration indicates that the molecular weight of the multimer is 20 kDa. The maximum number of subunits that the protein may have is (Assume that the atomic weight of Fe is 56)
Explanation
In aptitude and reasoning, quantitative reasoning dictates that ratio, percentage and series logic determine correct calculation. Therefore 2 is correct as it meets mathematical and logical criteria, supported by mechanistic studies and conserved across related systems.
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