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Question
Hemoglobin contains 0.33% of iron by weight. The molecular mass of hemoglobin is about 67200. The number of iron atoms (atomic mass of Fe = 56) present in a molecule of hemoglobin is?
Hemoglobin contains 0.33% of iron by weight. The molecular mass of hemoglobin is about 67200. The number of iron atoms (atomic mass of Fe = 56) present in a molecule of hemoglobin is?
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Solution
Hemoglobin:
- Hemoglobin is a globular protein found in red blood cells (RBCs) that delivers oxygen through the bloodstream.
- The heme prosthetic group is connected to each subunit of this tetrameric protein.
- It is a respiratory pigment that aids in transporting oxygen from the lungs to various sections of the body as oxyhemoglobin.
- Carbon dioxide is also carried back through haemoglobin in the form of carbaminohaemoglobin.
Calculation of Fe present in hemoglobin:
Percentage of Fe=0.33 % molecular weight of hemoglobin
Weight of Fe = 0.33 / 100 × 67200 = 221.8
One Fe weighs 55.8 g
Therefore, 221.8 / 55.8 = 4.
Final answer: The number of iron atoms present in a hemoglobin molecule is 4.
Hemoglobin:
- Hemoglobin is a globular protein found in red blood cells (RBCs) that delivers oxygen through the bloodstream.
- The heme prosthetic group is connected to each subunit of this tetrameric protein.
- It is a respiratory pigment that aids in transporting oxygen from the lungs to various sections of the body as oxyhemoglobin.
- Carbon dioxide is also carried back through haemoglobin in the form of carbaminohaemoglobin.
Calculation of Fe present in hemoglobin:
Percentage of Fe=0.33 % molecular weight of hemoglobin
Weight of Fe = 0.33 / 100 × 67200 = 221.8
One Fe weighs 55.8 g
Therefore, 221.8 / 55.8 = 4.
Final answer: The number of iron atoms present in a hemoglobin molecule is 4.
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