Biology 9700/23 May June 2020 | Cambridge AS Level Past Papers With Mark Scheme

1. Mechanisms of water movement in xylem vessels, the role of hydrogen bonding, and the movement of water between parenchyma cells.

2. Impact of insecticide-treated nets and indoor residual spraying on breaking malaria transmission cycles, trends in population protection, and immune responses to Plasmodium infection.

3. Structural identification of blood vessels, tissue fluid formation in capillary networks, and the role of smooth muscle in the respiratory system.

4. Functional roles of lipid droplets, lysosomes, and trehalase enzymes in Saccharomyces cerevisiae, with distinctions between regulatory and non-regulatory enzyme activities.

5. Genetic activity and cell cycle processes in blood cell formation, identification of ATP molecular structure, and the mitotic role in stem cell differentiation.

6. Analysis of sucrose solution concentrations affecting water potential in potato tissues, including experimental procedure and graphical estimation of water potential.