Which Feature Characterizes Hemoglobin

question 172

Multiple Choice

Which feature characterizes hemoglobin?

• A) It is a lead-containing molecule in the red blood cells of vertebrates that transports O₂.
• B) It can bind up to six O₂ molecules.
• C) It consists of two polypeptide subunits.
• D) Its capacity for transporting O₂ is slightly less than that of plasma.
• E) It binds carbon monoxide (CO) much more readily than it binds O₂.

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