Biology 9700/43 May June 2013 | Cambridge AS Level Past Papers With Mark Scheme

1. Structure and function of dicotyledonous leaves in photosynthesis, including carbon dioxide entry and fixation.
2. Use of genetically modified (GM) mosquitoes for controlling disease spread and analysis of promoter-driven gene expression.
3. Mycoprotein production through continuous culture fermentation and the management of fungal strain stability.
4. Effects of temperature on lizard oxygen consumption, comparing physiological adaptations for different activity levels.
5. In-vitro fertilization (IVF) techniques, including oocyte selection and freezing for enhanced fertilization success.
6. Mechanisms of cholinergic synapses, role of acetylcholinesterase, and effects of dopamine concentration in neurological conditions like schizophrenia.