Biology 9700/23 Oct Nov 2023 | Cambridge AS Level Past Papers With Mark Scheme

1. Analysis of Plasmodium falciparum division and its effects on red blood cells, highlighting immune response mechanisms through antibodies.

2. Investigation of starch phosphorylase activity in amylose synthesis, using colorimetry to monitor reaction progress and absorbance changes.

3. Role of haemoglobin in oxygen and carbon dioxide transport, influenced by 2,3-DPG concentration and its effect on oxygen dissociation curves.

4. Transcription process for collagen gene (COL1A2), mitochondrial division, and methods of ion movement into mitochondria.

5. Phloem transport mechanisms, source-sink dynamics, and role of pectin methylesterase in viral movement through plants.

6. Functional differences between atria and ventricles in mammalian hearts, with structural and electrical coordination for effective pumping.