Select the form of hemoglobin that contains iron in the ferric rather than the ferrous state
a. Myoglobin
b. Methemoglobin
c. Deoxyhemoglobin
d. Carboxyhemoglobin
ANS: B
Methemoglobin contains iron in the ferric form. This is nonfunctional hemoglobin (i.e., it cannot bind and carry oxygen).
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