Combined Science (A) J250,08 Higher June 2019, OCR GCSE Past Papers with Mark Schemes

The June 2019 OCR Science GCSE Paper 8 examines advanced biology concepts, focusing on the carbon and nitrogen cycles, evolution, and genetic inheritance. It emphasizes data analysis, practical applications, and environmental impacts, including mercury bioaccumulation and biodiversity loss due to carbon emissions. Key topics include bacterial resistance, food chain effects, HIV prevention, and human sperm production. Questions assess knowledge of genetic crosses, phylogenetics, and biotechnological methods, like selective breeding and microbial culturing. Graph interpretation, problem-solving, and calculations involving dilutions and survival rates are integral. Keywords: GCSE Biology, carbon cycle, nitrogen cycle, biodiversity, evolution, genetic inheritance, bacterial growth.