1. AP Biology Practice Test

AP Biology Multiple Choice Practice Test

Question 1 of 3
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Which of the following is the dominant reaction as blood flows through the pulmonary capillaries? (Hb=hemoglobin)
H2CO3 --> H+ + HCO3
Hb(O2)4 --> Hb + 4O2
Hb + 4O2 --> Hb(O2)4
H2O + CO2 --> H2CO3
Hb + 4CO2 --> Hb (CO2)4