Biology 9700/21 May June 2024 | Cambridge AS Level Past Papers With Mark Scheme

1. Cellular structure and membrane composition analysis, including functional roles of proteins, phospholipids, and cell signaling components.

2. Role of water in blood and properties facilitating its function in transportation, solvent action, and thermal regulation.

3. Mammalian closed, double circulation explained through structural and functional comparison of arteries, arterioles, and capillaries.

4. Pathogen identification using structural and transmission modes; mechanisms of antiviral drugs like tenofovir in inhibiting reverse transcriptase.

5. Transpiration rates in plant species, emphasizing adaptations of Nerium oleander for hot, dry conditions, with LVPD influence analysis.

6. Antibody specificity through antigen-binding sites; genetic mechanisms for antibody diversity via primary transcript modification.