The protein myoglobin
A) contains a high degree of b-pleated sheet structure
B) carries oxygen in the bloodstream
C) contains no histidine
D) contains a heme group

Question

Quizplus · Accepted Answer

Myoglobin contains a heme group, which is responsible for binding and carrying oxygen. Choice A is incorrect because myoglobin contains mostly alpha helices and not beta sheets. Choice B is incorrect because while myoglobin does carry oxygen, it is not in the bloodstream, but rather in muscle tissue. Choice C is incorrect because myoglobin does contain a histidine residue, which is important for coordinating with the iron atom in the heme group.

The Protein Myoglobin