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1. kidney ultrafiltration–Bowman’s capsule labeling, filtration of small molecules (glucose, ions, urea), glucose reabsorption via active transport in proximal tubule
2. ADH regulation–hypothalamus production, effect on collecting ducts, negative feedback mechanism, osmoreceptor involvement
3. gibberellin effect–internode elongation, hormone concentration correlation, gene expression for enzyme production in genetically modified tomatoes
4. Parkinson’s disease–Co-beneldopa action, L-dopa uptake vs dopamine conversion, genetic modification for L-dopa in plants, enzyme coding gene CYP76
5. cardiac physiology–adrenaline effect on heart rate, cardiac output and index calculation, age-based response comparison using graphical data
6. mitochondria function–pyruvate in Krebs cycle, ADP enhancement of CO₂ production, transport inhibition effect, fast vs slow twitch fiber mitochondrial density differences

Edexcel International AS/A Level Biology (WBI) Jun 2022 Biology (WBI) directory

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Biology WBI15/01 June 2022 | Edexcel International A Level Past Papers With Mark Scheme

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