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WAEC Biology 2008 Question 10

Question 10

Transport in Animals

Carbon dioxide is carried in the plasma

  1. A.in combination with haemoglobin
  2. B.in combination with antibodies
  3. C.by capillary action
  4. D.as bicarbonate ion.
Show the answer and explanation

Answer: D (as bicarbonate ion.)

Explanation

Most carbon dioxide is carried in the plasma as hydrogencarbonate (bicarbonate) ions; haemoglobin is in the red cells, not the plasma.