Biology 9700/01 Oct Nov 2005 | Cambridge AS Level Past Papers With Mark Scheme

1. Lipid and steroid synthesis by smooth endoplasmic reticulum; plasmodesmata exclusive to plant cells.

2. Protein and polysaccharide bond types: glycosidic in cellulose and sucrose, peptide in hemoglobin.

3. Benedict's test interpretation for reducing sugar concentration; ionic bond disruption by pH changes.

4. Symplast pathway in water movement; active sucrose transport into phloem companion cells.

5. High aortic pressure resistance via collagen and elastin fibers; cardiac cycle valve timing analysis.

6. Bohr effect curve shift from CO₂ changes; emphysema caused by alveolar wall elasticity loss.

7. Nicotine-induced platelet stickiness increasing clot risk; antibiotic restrictions to curb resistance.

8. Malaria vaccine challenges: parasite stages and immune system evasion; root nodule nitrogen fixation processes.