The OCR GCSE Biology Paper 2 (November 2020) covers DNA structure, genetic inheritance, and cellular respiration. Topics include food production′s environmental impact, disease transmission, and human reproductive systems. The paper emphasizes practical investigations, such as yeast respiration rates and greenhouse gas emissions from foods. Key themes include natural selection, antibiotic resistance, and ecosystem dynamics. Ethical considerations, data interpretation, and experimental design are integral, with real-world applications addressing public health, biodiversity, and sustainable resource management.