The OCR GCSE Biology Paper 3 (November 2020) covers biological processes such as mitosis, respiration, and protein synthesis. Key topics include kidney function, diffusion rates, hormonal regulation, and the use of selective herbicides. Practical investigations focus on enzyme activity, light intensity′s effect on transpiration, and gas exchange. The paper explores genetic disorders, osmosis, and adaptations in organisms. Emphasis is placed on experimental design, data analysis, and applications of biology in agriculture and medicine. Ethical and practical implications in biotechnology and healthcare are integrated throughout.