Biology 9700/43 Oct Nov 2011 | Cambridge AS Level Past Papers With Mark Scheme

1. Conservation strategies for Bengal Tigers: habitat preservation, anti-poaching measures, and breeding programs; differences between Animalia and Plantae kingdoms.

2. Role of lactase in lactose hydrolysis; immobilization benefits in enzyme activity, stability, and reuse for biotechnological applications.

3. Spermatogenesis and oogenesis processes; structure-function analysis of Graafian follicles and IVF procedure steps; age-related IVF success rates.

4. Wind pollination adaptations in maize, cross-pollination benefits for genetic diversity, and temperature effects on photosynthesis in C3 and C4 plants.

5. Genetic engineering of insulin using bacterial plasmids; comparison of human and animal insulin in diabetes treatment for immune compatibility and ethical benefits.

6. Pathways of anaerobic respiration in yeast and mammalian cells; ATP yield differences between anaerobic and aerobic respiration.

7. Hormonal regulation of blood glucose through insulin and glucagon; initial effects of dietary components and activities on glucose homeostasis.

8. Artificial selection principles in livestock breeding, addressing inbreeding depression risks while improving desirable traits like milk yield.