My mistakes from Jan paper:
*inability to describe the graph with figures. Make sure you include figures in descriptions from graphs people.
*AQA need specific answers. For the question asking you to describe the lock and key mechanism: I wrote enzyme is complementary to the substrate, but the markscheme specifically wanted active site.
*My own mistake - writing cancer takes a lot of time to be made, instead of develop (frustrating but i don't know why i wrote made?!?)
*This year was the only paper with a 3 mark question regarding "Can you conclude that ......... caused ....." or something, and I wrote what was on the previous markschemes, e.g. correlation not causation, other factors etc. But this time there was actually a mark for saying positive correlation!
*Read the graph properly. For the question about no change in mass or whatever, I wrote 0.34, thinking that the markscheme would allow 0.34-0.36, but you had to write 0.35, so i got 0 marks.