The right answer is glycolysis (anaerobic respiration).
The red blood cell is a cell that does not require much energy to live, it is content with anaerobic glycolysis. This may seem paradoxical, because the red blood cell is rich in oxygen due to its transport by hemoglobin, but the red blood cells saves energy consumption so as not to draw oxygen and transport the maximum of it.
The red blood cell must produce energy for 2 main purposes:
Maintain the integrity of the membrane,.
Maintain Hb in its active form.
