Biology 9700/23 May June 2024 | Cambridge AS Level Past Papers With Mark Scheme

1. Analysis of Zika virus structure and transmission, highlighting protein capsid and RNA genome, with comparisons to malaria transmission via mosquitoes.

2. Examination of collagen structure and its fibrous assembly, emphasizing molecular stability through amino acid modifications like hydroxylysine.

3. Detailed structural and functional comparison of arteries, veins, and capillaries, including endothelium, tunica media, and smooth muscle.

4. Roles of lignin and suberin in plant water transport, focusing on their hydrophobic properties and contribution to structural support.

5. Cyclin-dependent kinase (CDK) regulation in the cell cycle, including the impact of inhibitors on phases such as G1, S, and G2 to mitosis transitions.

6. Structural differences between DNA and mRNA, such as sugar type, base composition, and strand configuration.