Myoglobin and the subunits of hemoglobin have:
A) no obvious structural relationship.
B) very different primary and tertiary structures.
C) very similar primary and tertiary structures.
D) very similar primary structures, but different tertiary structures.
E) very similar tertiary structures, but different primary structures.

Question

Quizplus · Accepted Answer

Myoglobin and the subunits of hemoglobin have very similar tertiary structures, which means their three-dimensional shapes are alike, allowing them to perform similar functions in oxygen binding. However, their primary structures, or the sequence of amino acids, are different.

Myoglobin and the Subunits of Hemoglobin Have