Multiple choice

Which of the following pairs of iron complexes and their function in living organisms is not correctly matched?

  1. Catalase - H2O2 metabolism

  2. Ferritin - Plasma Fe transport

  3. Cytochrome c - Electron transport

  4. Hemoglobin - Blood O2 transport

  5. Myoglobin - Muscle O2 storage
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B Correct answer
Explanation

Within cells, iron is stored in a protein complex as ferritin. Ferritin is a intracellular protein that stores iron and releases it in a controlled fashion. Iron circulates in plasma bound to transferrin (which can bind one or two iron molecules).

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