Combined Science 8464/1H June 2023

AQA GCSE Combined Science (8464) Jun 2023

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The June 2023 GCSE Combined Science Biology Paper 1 (Higher Tier) covers communicable and non-communicable diseases, highlighting obesity, BMI, and the effects of smoking. Experimental techniques include estimating cell sizes and studying starch digestion with colorimetry. The circulatory system focuses on double circulation, heart pacemakers, and structural differences in blood vessels. Leaf anatomy examines xylem adaptations and guard cell glucose dynamics. Photosynthesis and gas exchange are analyzed through light intensity effects. Antibiotic resistance mechanisms, bacterial mutations, and alternative infection treatments with stem cells are evaluated. Keywords: biology, diseases, obesity, circulation, photosynthesis, antibiotics, stem cells, starch digestion.