Biology 9700/13 May June 2019 | Cambridge AS Level Past Papers With Mark Scheme

1. Identification of organelles involved in protein secretion and features distinguishing lysosomes and ATP production mechanisms.

2. Characteristics of hexose sugars in carbohydrates, effects of condensation reactions, and structural features of triglycerides and collagen.

3. Impact of enzyme activity parameters, including Km values, competitive inhibitors, and protein structural changes during induced fit interactions.

4. Fluid mosaic model elements, membrane transport mechanisms affected by cholesterol and phospholipid composition, and roles of glycoproteins in virus-host interactions.

5. Water potential effects on plant tissues in hypertonic environments and adaptations of cells for mitotic processes, including telomere maintenance in actively dividing cells.

6. Genetic mutations affecting protein coding, DNA replication experiments, and consequences of specific mutations on polypeptide structure and function.

7. Osmotic processes in roots, the role of plant tissue structures in water transport pathways, and features of blood vessels correlating with functional roles.

8. Oxygen dissociation curves of hemoglobin, biochemical implications of carbon dioxide binding, and biochemical distinctions between infectious diseases and antibiotic mechanisms.

9. Mechanisms of artificial active immunity and the application of monoclonal antibodies in targeted cancer therapies.