Biology 9700/06 Oct Nov 2006 | Cambridge AS Level Past Papers With Mark Scheme

1. Duchenne Muscular Dystrophy: X-linked inheritance, dystrophin's role in anchoring actin filaments, and effects of dystrophin deficiency on muscle function.

2. Cholesterol regulation: liver-based negative feedback mechanisms, statin effects on cholesterol synthesis, and risk reduction in circulatory diseases.

3. Antibiotic resistance: trends in bacterial resistance linked to antibiotic use, effects of restricted antibiotics in animal feed, and penicillin's bacterial action.

4. Photosynthesis investigations: impact of CO\\(_2\\) concentration, oxygen collection as a proxy for photosynthesis rate, and methodological refinements.

5. Seed banks: collection, storage protocols, and importance for preserving plant species with high endemicity in islands.

6. Genetic testing: Huntington's disease inheritance patterns analyzed through gel electrophoresis, correlation between DNA fragment size and symptom onset.