Yello there, understand the question requirement. In as much as you know the topic in question, do your level best to tailor your knowledge to the senario given.
Where we have 5marks given, with good explanation and examples given you could just write 4 points, but in cases where you are not sure or not VERY strong anwers to be on the safe side you could write all 5 points.
Get more info from the Video lecture on the introduction given by the tutor.