Which statement about CO binding to hemoglobin is NOT correct? A) CO binds to hemoglobin better than O₂ does. B) CO binding to hemoglobin is reversible. C) The binding of one CO molecule to hemoglobin makes the binding of other CO molecules more efficient. D) A histidine residue in hemoglobin reduces the affinity of CO binding to heme. E) The binding of one CO molecule to hemoglobin makes the binding of O₂ molecules more efficient.

Question

Quizplus · Accepted Answer

The incorrect statement is that a histidine residue in hemoglobin reduces the affinity of CO binding to heme. In fact, histidine residues in hemoglobin play a role in the structural changes of the protein but do not directly reduce the affinity of CO binding. CO has a very high affinity for hemoglobin, much higher than oxygen, and this affinity is not reduced by histidine residues.

Which Statement About CO Binding to Hemoglobin Is NOT Correct