Describe5 marksStandard
During vigorous exercise, muscle cells produce large amounts of carbon dioxide. Describe the role of carbonic anhydrase in red blood cells in the transport of this carbon dioxide to the lungs.
CAIE A Level Biology 9700 · Transport in mammals
Transport in mammals: describe question
How this question is marked
5 marks, so the mark scheme is looking for about 5 separate creditworthy points. Making the same point twice in different words earns it once.
Describe means: Say what happens or what something is like, in order and with detail. You are not being asked why. If there is data, quote it: name the trend, then give figures with units at the points where it changes.
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