Bad biology mock grade.

Fist check the specification making sure you know everything and more , EVERYTHING!
Once you know everything you really have to sit and thing how different parts (topics) relate to each other.
I you have a book, they usually have "did you know?" "study tip" or end of chapter articles. They are very useful , must have a look.
The book questions , definitely do them . Some might be easy but they really help you understand, even if you think that's a easy chapter.
Anything you don't understand , don't just leave it . Ask teacher(I know this never happens) so ask your friends, watch videos , read online ...
Any chapter you struggle in just write the steps or whatever down to help memory and understanding , and a video will always compensate.
This next thing helped me a lot, talk to your friends about the chapters, discuss about it, ask each other questions. This will help the most.
The obvious past papers is always there, read mark schemes and try to see what they are looking for e.g. terminology or style. Reading the question very carefully to see what type of question it is and what It is actually asking.
For experimental questions, look at different exam boards. Might be slightly of topic but knowing more than needed will never harm you and it's the key to the A*s. Read your friends answers and see how they approach them.
Finally, don't waste to much time writing notes and stuff (I mean you have the book and can ask teachers to send you the presentations), anytime you need something just open up the book and read!!!! Taking notes is time consuming , in class it can be a distraction. And when taking notes you tend to summarise (missing out knowledge that you might need, so read from the book if you need something !!!!!!!!).
Best of luck,
Hammad

Thank you for taking the time to read my post and reply with a very helpful post. The section on the notes was particularly helpful and looking at other mark schemes for the application questions. The majority of my marks I lost were maths related, during the exam, I didn't read the questions close enough which meant I lost a lot of marks on those sections as well. I've just been reading my answers to paper 2 and paper 3 and I saw the problem was I wasn't answering the question. I would write some relevant information but go off on a tangent. Have you got any advice for the math sections? Usually, I can do it, but in the Exam, it went wrong, I don't know why.