Biology 9700/11 May June 2015 | Cambridge AS Level Past Papers With Mark Scheme

1. Measurement units for cellular structures; micrometers and nanometers for alveoli, cell walls, and white blood cells.

2. Common structures between bacterial and animal cells; cell membrane, DNA, and ribosomes.

3. Calibration of stage micrometers for chloroplast width; unit conversion accuracy in microscopy.

4. Cellular components in eukaryotic cells; differences in ribosome types and DNA organization.

5. Role of the nucleolus in rRNA synthesis; structure and functions of collagen, including triple helix formation.

6. Polar properties of water enabling solvent capability, cohesion, and specific heat capacity.

7. Effects of enzyme inhibitors on active sites, reaction rates, and competitive versus non-competitive inhibition graphs.

8. Roles of glycoproteins on cell membranes; active transport processes like sodium-potassium pumps in maintaining ion gradients.

9. Membrane fluidity factors including unsaturated fatty acid presence and temperature impacts.

10. Genetic and evolutionary concepts in DNA, RNA pairing, hemoglobin oxygen saturation, and energy flow in ecosystems.