The centre of porphyrin ring of haemoglobin is occupied by:
Correct answer: C. Iron
- A. Magnesium
- B. Sodium
- C. Iron
- D. Potassium
Explanation
Hemoglobin is a protein in red blood cells responsible for oxygen transport. The core of its porphyrin ring, known as the heme group, contains iron. This iron atom binds oxygen, facilitating its transport throughout the body. Magnesium is central to chlorophyll in plants, while sodium and potassium are electrolytes not involved in the porphyrin structure of hemoglobin.
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About Conjugated Molecules
Conjugated molecules contain a non-protein component attached to a protein portion, giving the molecule properties that a simple protein lacks. The content includes glycoproteins, lipoproteins, phosphoproteins, nucleoproteins, chromoproteins and metalloproteins, with attention to their prosthetic groups and roles in transport, protection, catalysis and cellular structure.
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