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Biology
Most oxygen is carried by the blood (i). Most carbon dioxide is carried by the blood (ii).
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Q. Most oxygen is carried by the blood __(i)__. Most carbon dioxide is carried by the blood __(ii)__.
Breathing and Exchange of Gases
A
(i) attached to haemoglobin. (ii) in the form of bicarbonate ions.
70%
B
(i) dissolved in plasma . (ii) dissolved in plasma.
3%
C
(i) in the form of $H^+$ ions . (ii) in the form of bicarbonate ions.
20%
D
(i) attached to haemoglobin (ii) attached to haemoglobin.
7%
Solution:
Most oxygen is carried by haemoglobin and most carbon dioxide is carried as bicarbonate ions.