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. By itself, home is not a good oxygen carrier. It must be part of a larger protein to prevent oxidation of the iron atom. Molecular oxygen binds reversibly to Fe^2+ in home. Both hemoglobin and myoglobin contain a prosthetic group called home, which contains a central iron atom. Hemoglobin is a heterotertramer, whereas myoglobin is a monomer. Each iron atom can form six coordination bonds: Two of these bonds are formed between iron and oxygen. Hemet is composed of an organic protoporphyrin component and a metal atom. Each hemoglobin or myoglobin molecule can bind four oxygen molecules.

Explanation / Answer

The true statements are-

1. By itself, heme is not a good oxygen carrier. It must be part of a larger protein to prevent oxidation of the iron atom.
2. Molecular oxygen binds reversibly to the Fe2+ in heme
3. Both hemoglobin and myoglobin contain a prosthetic group called heme, which contains a central iron atom.
4. Hemoglobin is a heterotetramer, whereas myoglobin is a monomer.
5. Heme is composed of an organic protoporphyrin component and a metal atom.

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