Question Detail
Question
Which level of protein structure is most directly involved in the biological function of hemoglobin?
Correct Answer
Option C is the correct answer.
Detailed Explanation
Hemoglobin is a globular protein with quaternary structure, consisting of four polypeptide subunits (two alpha and two beta chains). Its ability to bind and release oxygen cooperatively depends on the precise interactions between these subunits.
Hint
Hemoglobin is a multi-subunit protein.