. Haemoglobin contains zero point three three four of iron by weight
The molecular weight of haemoglobin is approximately 67200 . The number of iron atoms (Atomic weight of Fe is 56 ) present in one molecule of hemoglobin is
(a) 4
(b) 6
(c) 3
(d) 2
Best Answer
Correct Option is: (A)
Given that haemoglobin is 0.334% of iron by weight.
Molecular weight of hB = 67200 g/mol
Quantity of iron in one molecule =0.334/100 × 67200 = 224.45amu
No. of Fe atoms in one haemoglobin molecule = given mass of Fe / atomic mass of fe
= 224.45/56 = 4
Therefore, there are 4 iron atoms in 1 molecule of haemoglobin.
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