CAIE A Level Biology 9700 · Nucleic acids and protein synthesis
Describe how the antiparallel structure of DNA and the direction of nucleotide addition by DNA polymerase result in one strand being replicated continuously and the other being replicated in fragments. Include the role of DNA ligase in your answer.
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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