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 reversibly to Fe^2+ in home. Hemet is composed of an organic protoporphyrin component and a metal atom. By itself, home is not a good oxygen carrier. It must be part of a larger protein to prevent oxidation of the Iron atom. Which iron atom can form six coordination bonds: Two of these bonds are formed between iron and oxygen. Hemoglobin is a heterotetramer, whereas myoglobin is a monomer. Both hemoglobin and myoglobin contain a prosthetic group called hemi, which contains a central iron atom. Each hemoglobin or myoglobin molecule can bind four oxygen molecules. One of the statements you chose is incorrect, and there is another correct answer. Consider how oxygen is delivered to body tissues.

Explanation / Answer

Correct answers are

a) Molecular oxygen binds reversibly to Fe2+ in heme.

b) Heme is composed of an organic protoporphyrin component and a metal atom.

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

e) Hemoglobin is a heterotetramer, whereas myoglobin is a monomer.

f) Both hemoglobin and myoglobin contain a prosthetic group called heme, which contains a central iron atom.

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