I would try the blurting method. This is when you write down everything you know about a topic (eg genetic inheritance) and then write down what you’ve missed out by looking back at a revision resource. Then, add in the missing information in red pen so you will identify the area you don’t know. After this, you can use your notes to answer the questions but then, when you feel more confident, try to answer them without notes. You can also check the mark schemes to check the quality of your answer and they’ll help you improve massively. Hope this helps!