AP Biology MCQ Biochemistry DNA Hemoglobin is a protein composed of four subunits, each with a binding site for oxygen. When a molecule of O2 binds to any one of the subunits, the affinity of the other three subunits for O2 is increased. What role is oxygen playing in this process?

Hemoglobin is a protein composed of four subunits, each with a binding site for oxygen. When a molecule of O2 binds to any one of the subunits, the affinity of the other three subunits for O2 is increased. What role is oxygen playing in this process?

Hemoglobin is a protein composed of four subunits, each with a binding site for oxygen. When a molecule of O2 binds to any one of the subunits, the affinity of the other three subunits for O2 is increased. What role is oxygen playing in this process?

A. enzyme
B. allosteric activator
C. allosteric inhibitor
D. substrate

Answer: B

AP Biology MCQ

Hemoglobin is a protein composed of four subunits, each with a binding site for oxygen. When a molecule of O2 binds to any one of the subunits, the affinity of the other three subunits for O2 is increased. What role is oxygen playing in this process?

Hemoglobin is a protein composed of four subunits, each with a binding site for oxygen. When a molecule of O2 binds to any one of the subunits, the affinity of the other three subunits for O2 is increased. What role is oxygen playing in this process?

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