Biology 9700/41 Oct Nov 2021 | Cambridge AS Level Past Papers With Mark Scheme

- Kidney nephron structure: efferent blood vessel, ADH response, podocyte cells, medulla location.
- Proximal convoluted tubule adaptations: microvilli presence, mitochondria abundance, transport proteins, selective reabsorption efficiency.
- ADH concentration trends: correlation with blood water potential changes, physiological implications of low ADH levels.
- Rubisco activase activity: temperature effects on cotton and false flax, enzyme efficiency, implications for crop yield.
- Ecological surveys: biodiversity measurement techniques, species extinction and introduction factors, conservation decision-making.
- Genetic engineering goals: heat tolerance in crops, gibberellin synthesis location, enzyme involvement in germination processes.