Combined Science 8464/1H June 2020

AQA GCSE Combined Science (8464) Jun 2020

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The November 2020 GCSE Combined Science Biology Paper 1 (Higher Tier) explores osmosis using sugar solutions, analyzing mass changes in potato samples. Digestive processes are examined with a focus on enzyme activity, villus structure, and nutrient absorption through active transport and diffusion. Topics include the relationship between BMI, obesity, and health risks, alongside physiological changes during anaerobic respiration. Cellular biology addresses differences between bacterial and plant cells, gonorrhea vaccination mechanisms, and reducing Salmonella transmission. Photosynthesis efficiency in greenhouses is analyzed with economic implications. Drug testing phases, peer review significance, and cost-benefit evaluations of treatment options are highlighted. Keywords: biology, osmosis, digestion, villi, photosynthesis, BMI, respiration, drug testing.