How many molecules of oxygen can one molecule of hemoglobin carry?
a. One
b. Two
c. Three
d. Four
ANS: D
Each heme group is capable of carrying one molecule of oxygen. Because four heme groups exist in one molecule of hemoglobin, each hemoglobin molecule can carry four molecules of oxygen.
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Which of the following requires that the criteria used to distribute a scarce resource be morally relevant?
a. material justice b. distributive justice c. formal justice d. moral justice
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