CAIE A Level Biology 9700 · Biological molecules
Water is a molecule with unique properties essential for life. Describe how hydrogen bonding occurs between two water molecules. Then, explain how this hydrogen bonding gives water its solvent action and its high specific heat capacity. For each property, give one example of its importance in living organisms.
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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