CAIE A Level Biology 9700 · Photosynthesis
A student extracted pigments from a leaf and separated them by paper chromatography using a non-polar solvent. The following Rf values were calculated:
Describe how the structure of the chloroplast is adapted for the light-dependent and light-independent stages of photosynthesis. In your answer, refer to the pigments identified in the chromatogram and their roles.
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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