Biology 9700/11 Oct Nov 2013 | Cambridge AS Level Past Papers With Mark Scheme

1. Comparison of light and electron microscopes, identifying cell structures visible only under electron microscopy.

2. Hydrolysis reactions in biomolecules, peptide bond formation, and structural properties of proteins like collagen.

3. Enzyme inhibition mechanisms, effects of temperature on enzyme activity, and competitive inhibitors reducing reaction rates.

4. Diffusion and osmosis principles in plant and animal cells, water potential impact on cell volume, and structural features of gas exchange surfaces.

5. Cardiac cycle events, effects of heart block, and electrical impulse conduction in cardiac tissues.

6. Immune system components: T-lymphocyte functions, antibody structural bonds, and energy flow in ecosystems.