What does hemoglobin's Hill constant of approximately 3 imply about its binding behavior?

• A. Hemoglobin exhibits negative cooperativity and binds ligands inefficiently.
• B. Hemoglobin exhibits positive cooperativity but does not fully utilize all binding sites simultaneously.
• C. Hemoglobin binds ligands independently without cooperativity.
• D. Hemoglobin binds ligands sequentially without any cooperativity.

Answer: (B)