Biology 9700/21 May June 2014 | Cambridge AS Level Past Papers With Mark Scheme

1. Structure and function of Vibrio cholerae cell components, comparison with eukaryotic mesophyll cells, and transmission routes of cholera.

2. Ecological interactions among Azolla filiculoides, Anabaena azollae, and Stenopelmus rufinasus, emphasizing nitrogen-fixing roles and ecosystem importance.

3. Structural features of amylose, glycogen, and cellulose, enzymatic digestion of starch, and competitive inhibition by ascorbase in type 2 diabetes treatment.

4. B-lymphocyte activation and differentiation upon non-self antigen recognition, antibody production and release, and immune memory cell roles.

5. Comparative analysis of heart chamber thickness, mechanisms ensuring unidirectional blood flow, and coordination of cardiac cycles in systemic and pulmonary circulation.