The OCR GCSE Biology Paper 1 (November 2020) covers cellular structures, genetic inheritance, and the immune system. Key topics include photosynthesis, respiration, the circulatory system, and plant tropisms. The paper emphasizes practical investigations, such as food tests, and examines human health issues like diabetes, cancer, and cardiovascular disease. It highlights evolutionary theory, antibiotic resistance, and global biodiversity challenges. Ethical considerations and data interpretation play a central role, alongside real-world applications of genetic and ecological concepts. Experimental design and critical thinking are integral to assessing biological systems and their implications.