Muscle haemoglobin possesses:
Correct answer: B. Tertiary structure
- A. Primary structure
- B. Tertiary structure
- C. Secondary structure
- D. Quaternary structure
Explanation
Muscle haemoglobin, known as myoglobin, possesses a tertiary structure. This level of protein structure refers to the three-dimensional folding of a single polypeptide chain, enabling myoglobin to efficiently store and release oxygen. Primary and secondary structures are foundational but do not define the functional shape required for its physiological role. Quaternary structure is irrelevant to myoglobin as it is a monomer. Thus, the correct answer is the tertiary structure, essential for myoglobin's oxygen-binding function.
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