Biology 9700/11 Oct Nov 2014 | Cambridge AS Level Past Papers With Mark Scheme

1. Experimental errors from parallax and cell structures associated with lipid buildup in Tay-Sachs disease.
2. Identification of organelles with 70S ribosomes and circular DNA, distinguishing enzyme activity inhibitors by interaction type.
3. Properties and functions of cellular components in sucrose transport and vitamin absorption pathways in cell membranes.
4. Bohr effect description in hemoglobin oxygen affinity shifts due to CO2 levels; carbonic anhydrase products in gas exchange.
5. Tobacco smoke effects on cardiovascular health, lung disease diagnostics via peak flow rates, and disease transmission routes.
6. Nitrogen cycle processes by specific bacteria, energy flow inefficiencies in freshwater ecosystems, and challenges in eradicating cholera through vaccination.