no.of points based on marks

Although there is no fixed rule, if you have studied the marking schemes printed at the end of each set of exam answers, it is usually 2 markers per point. So for 8 marks you would ideally write 4 points. Much more importantly, is that your aim must always be to get at least 50% for every part of every question and therefore pass the exam. So if for an 8 mark part of a question you can think of 4 points quickly then great. More likely you will not be able to think of 4 points, so rather than waste time struggling to think of more you need to make sure you can at least make 2 points and get your 50% - anything extra is then a bonus.