The OCR GCSE Biology Paper 2 (November 2021) explores human health, genetic inheritance, and ecosystem interactions. Topics include pathogen transmission, the food web, water uptake in plants, and the carbon cycle. Practical investigations focus on osmosis in potato cells, water usage in plants, and microscopy. The paper emphasizes ethical and scientific inquiry, real-world applications like contraceptive methods, and disease prevention. Key areas include natural selection, photosynthesis, circulatory system functions, and data analysis, with attention to environmental impacts and human activity. Experimental design and problem-solving are central themes.