When Oxygen Binds to a Heme-Containing Protein, the Two Open

question 19

Multiple Choice

When oxygen binds to a heme-containing protein, the two open coordination bonds of Fe²⁺ are occupied by:

• A) one O atom and one amino acid atom.
• B) one O₂ molecule and one amino acid atom.
• C) one O₂ molecule and one heme atom.
• D) two O atoms.
• E) two O₂ molecules.

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