A 16-mark question can be broken down into two or three objectives: AO1 (content), AO2 (application) and AO3 (evaluation). Depending on the question you will be asked for just AO1 and AO3 or AO1, AO2 and AO3. For a question that requires just AO1 and AO3, the best structure is to lay out 3, well developed, content points followed by 5 well developed evaluation points, relating to the question asked. For a question that requires all 3 AO's, the best structure is to intertwine your content and your application (ensuring to refer back to the key points in the question). You should aim to make 2-3 well developed points. You will follow this with 3-4 well developed evaluation points, again relating to the question.