The following information is taken from The Ultimate BMAT Guide: 600 Practice Questions
Although the BMAT only tests GCSE level knowledge, you may not have covered all examinable topic – even if you’re studying biology, chemistry, maths and physics at A-level. This is because the BMAT tests a wide variety of GCSE level topics that you might not have covered at school e.g. parallel circuits, reflexes.
Thus, in order for you to do well in BMAT section 2 – you must first ensure that you don’t have any gaps in your knowledge. The best way to do this is to use the BMATspecification and let it guide your learning. Start with the biology section as this is the subject that most people have gaps in knowledge with. Go through each bullet point on the specification and if you’re unsure – learn and revise that particular topic.
You should also use the physics section of the BMAT specification to consolidate your knowledge of the commonly used equations. When you feel like you’re comfortable with all the topics – it’s time to start approaching past papers.
Since the BMAT specification was changed in 2009, some things asked in earlier papers may not be representative of the content that is currently examinable in the BMAT. In general, it is worth doing at least all the papers from 2009 onwards. Time permitting; you can work backwards from 2009 although there is little point doing the section 3 essays pre-2009 as they are significantly different to the current style of essays.