The idea behind your research project is not to produce a booklet several hundred pages thick with loads of waffle, but to show you know what you're talking about and how you would go about applying the science you've learned to solving a real-world problem.
Depending on how your school organises the project, you might be given a scenario to investigate, or you might get to choose what to investigate. Interesting though a project on genetic engineering on superhumans might be, it's not going to tie in to the topics directly.
The thing everyone starts with is a project to investigate. Where do you go from there? The portfolio needs to show you can start with a question, think about a way to solve it, then build on your initial thoughts to produce a workable plan.
From this plan, you carry out your investigation and then draw some interesting and valid conclusions. Then you should evaluate what you've done. Click back to the main sections and I'll take you through how to do this.