9700/11 Biology May Jun 2020 Online Test | Cambridge AS and A Level MCQ
What is correct about the transport of carbon dioxide by blood?
1 The enzyme carbonic anhydrase catalyses the formation of carbonic acid in red blood cells.
2 Carbon dioxide diffuses from active cells to red blood cells and reacts with water.
3 Carbonic acid dissociates forming hydrogen ions that combine with haemoglobin to form carbaminohaemoglobin.