Biology 9700/23 Oct Nov 2015 | Cambridge AS Level Past Papers With Mark Scheme

1. Structures and processes in antibody production, glycoprotein composition, and the genetic basis for antibody molecule formation.
2. Stomatal aperture effects on transpiration under different airflow conditions, xerophyte adaptations, and dry-condition survival mechanisms in plants.
3. Catalase activity in Anopheles gambiae, effects of single amino acid differences on enzyme function, and the role of catalase in egg production.
4. Glycogen structure and benefits of high branching for energy storage, cellulose versus glycogen structural differences, and energy transfer inefficiencies from animal-based food production.
5. Cardiovascular impacts of nicotine and carbon monoxide, surgical bypass treatments for coronary artery disease, and government actions to reduce heart disease prevalence.