Question

q the deadly effects of carbon monoxide (co) are due to its competitive binding at the same sites as oxygen on hemoglobin. complete co saturation of a single hemoglobin molecule would involve binding to how many sites?
description sys2 blood obj2b
a 3
b 1
c 2
d 4

Explanation:

Hemoglobin is a protein in red blood cells. Each hemoglobin molecule is composed of four heme groups. Each heme group can bind to one oxygen molecule or one carbon monoxide molecule. So, for complete saturation (all binding sites occupied), a single hemoglobin molecule would bind to 4 carbon monoxide molecules as there are 4 binding sites (one per heme group).

Answer:

D. 4