What exactly are you struggling in remembering? If you're looking for good ways to memorise something, I recommend reading notes out aloud, or teaching someone about the concepts that you've learned about. I find that these methods are really effective in keeping information that might otherwise be lost pretty quickly. For things like cell cycles, photosynthesis and aerobic respiration, the trick is to visualise what's going on, and understand why things are doing what they do. Drawing diagrams is a great way to lay out exactly what is going on at each step of the process. Usually, things happen in these processes for a very specific, and often important reason. Figure out why these things happen. It allows for much more effective learning when you truly understand what's going on, rather than just accepting facts.
In SACs, my advice is to answer the question concisely, using careful and precise definitions (preferably taken from the textbook or another reliable source), but always answering in the correct amount of depth. For instance, a 3 mark question will usually require 3 points of information in order to gain full marks. A skill that you'll hopefully be learning is deciphering what information you need to provide that is relevant to the question you're answering. Keep an eye on the time too. In biology, I found time slipped away quite quickly, so it's important to be able to recall learnt information pretty quickly, to save as much time as possible to finish on time as well as check over your answers. Checking answers is also essential, you'll pick up a lot of marks you might otherwise have dropped due to careless mistakes. These skills also apply to the exam, so picking them up is a long-term investment that will pay off when you come into your exam confident and (relatively) calm. Hope this helped!