CAIE A Level Biology 9700 · Nucleic acids and protein synthesis
A molecular biologist is explaining the structural features of nucleotides to a class. She states that both DNA nucleotides and ATP molecules are considered nucleotides. With reference to the components of these molecules, explain the similarities and differences between the structure of a DNA nucleotide and that of an ATP molecule.
4 marks, so the mark scheme is looking for about 4 separate creditworthy points. Making the same point twice in different words earns it once.
Explain means: Give the reasons or the mechanism: why or how something happens. Link each point to the next with because, so or which means. A list of facts with no links usually loses the reasoning marks.
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