Atrue statement about both myoglobin and hemoglobin protein is: select one: a. they have no obvious structural relationship b. they have nearly identical primary structures, but different quaternary structures c. very similar primary and tertiary structures. d. very similar tertiary structures, but different primary structures e. they have very different primary and tertiary structures.

c. Very similar primary and tertiary structures.

Explanation:

They both are globular proteins, having oxygen binding sites also named as heme groups. Number of chains are different, as hemoglobin contains 4 polypeptide chains whereas myoglobin contains only one polypeptide chain. But structures and sequences are somewhat similar.

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