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Classification: Edexcel Paper 2
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Crash report
Biology 4BI1/2B November 2023
1. Photosynthesis and Carbon Sequestration: Increased photosynthesis due to rising CO₂ levels, measurement of global photosynthesis using carbonyl sulfide, and role of forests as carbon sinks.
2. Plant Physiology and Gas Exchange: Stomatal response to increased CO₂, effects on leaf toughness and insect feeding, and the impact of light intensity on plant gas exchange.
3. Enzyme Activity and pH Effects: Catalase activity in hydrogen peroxide breakdown, effect of pH on reaction rate, and experimental control of abiotic factors.
4. Kidney Function and Filtration: Structure and role of nephron parts, glucose reabsorption, ADH influence on water retention, and urine concentration changes during dehydration.
5. Mutation and Genetic Variation: Impact of single base mutations on protein synthesis, differences in mutation rates during mitosis and meiosis, and mutation rate calculations.
6. Nitrogen Cycle and Agricultural Impact: Processes of nitrification, denitrification, and nitrogen fixation, nitrate pollution in rivers, and correlation between fertilizer use and water quality.
2. Plant Physiology and Gas Exchange: Stomatal response to increased CO₂, effects on leaf toughness and insect feeding, and the impact of light intensity on plant gas exchange.
3. Enzyme Activity and pH Effects: Catalase activity in hydrogen peroxide breakdown, effect of pH on reaction rate, and experimental control of abiotic factors.
4. Kidney Function and Filtration: Structure and role of nephron parts, glucose reabsorption, ADH influence on water retention, and urine concentration changes during dehydration.
5. Mutation and Genetic Variation: Impact of single base mutations on protein synthesis, differences in mutation rates during mitosis and meiosis, and mutation rate calculations.
6. Nitrogen Cycle and Agricultural Impact: Processes of nitrification, denitrification, and nitrogen fixation, nitrate pollution in rivers, and correlation between fertilizer use and water quality.