Which of the following statements about hemoglobin and myoglobin structure are t

Question

Which of the following statements about hemoglobin and myoglobin structure are true? select the five true statements. Molecular oxygen binds irreversibly to Fe^2+ in heme. Heme is composed of an organic protoporphyrin component and a metal atom. Both hemoglobin and myoglobin contain a prosthetic group called heme, which contains a central iron atom. Each hemoglobin or myoglobin molecule can bind four oxygen molecules. By itself, heme is not a good oxygen carrier. It must be part of a larger protein to prevent oxidation of the iron atom. Hemoglobin is a heterotetramer, whereas myoglobin is a monomer. Each iron atom can form six coordination bonds: One of these bonds is formed between iron and oxygen.

Explanation / Answer

True statements are

1. Heme is composed of an organic protoporphyrin and a metal atom

2. Both hemoglobin and Myoglobin contain a prosthetic group called heme, contains a central iron atom

3. By itself, heme is not a good oxygen carrier. It must be part of larger protein to prevent oxidation of iron atom

4. Hemoglobin is heterotetramer, whereas Myoglobin is a monomer

5. Each iron atom can form 6 coordination bonds: one of These is formed between iron and oxygen

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