Biochemistry—Oxygen-Binding Proteins Which statement about hemoglobin (Hb) and myoglobin (Mb) is INCORRECT?

Introduction / Context:
Hemoglobin and myoglobin are classic examples of heme proteins that bind oxygen, but they serve different physiological roles. The task is to determine whether any given statements are wrong.

Given Data / Assumptions:

• Hemoglobin is a tetrameric blood protein specialized for oxygen transport.
• Myoglobin is a monomeric muscle protein specialized for oxygen storage and facilitated diffusion within muscle cells.
• All statements A–C reflect standard physiology.

Concept / Approach:
Check each statement against canonical functions. If all of A–C are correct, then “None of the above is incorrect” becomes the right choice.

Step-by-Step Solution:

Verification / Alternative check:
Binding curves: Hb shows sigmoidal cooperative binding (transport), Mb shows hyperbolic high affinity (storage). This aligns with the statements.

Why Other Options Are Wrong:

• E is misleading: primary long-distance O2 transport is the role of hemoglobin, not myoglobin.

Common Pitfalls:
Confusing Mb with Hb in transport; assuming both are tetrameric (Mb is monomeric).

Final Answer:
None of the above statements is incorrect.