Analyze the structural differences between hemoglobin and myoglobin that lead to their distinct oxygen binding curves.

• A. Myoglobin has multiple subunits allowing cooperativity, while hemoglobin has a single subunit and does not exhibit cooperativity.
• B. Hemoglobin has multiple subunits allowing cooperativity, while myoglobin has a single subunit and does not exhibit cooperativity.
• C. Both hemoglobin and myoglobin have multiple subunits, but only hemoglobin exhibits cooperativity.
• D. Neither hemoglobin nor myoglobin exhibit cooperativity due to their single subunit structure.

Answer: (B)