Biology 9700/21 Oct Nov 2015 | Cambridge AS Level Past Papers With Mark Scheme

1. Investigating mitochondrial function, calculating magnification from electron micrographs, and comparing mitochondrial features with prokaryotes.

2. Exploring ion transport through channel proteins, analyzing protein structure levels, and interactions between proteins and phospholipids.

3. Understanding mitosis stages, DNA replication processes, and the importance of haploid cells in plants like Allium sativum.

4. Examining xerophytic adaptations in Ammophila arenaria, analyzing transpiration and water uptake patterns, and their relation to environmental conditions.

5. Investigating the measles pathogen's RNA replication mechanism, immune response activation by T-lymphocytes, and RNA-DNA structural differences.

6. Analyzing food web components, identifying trophic levels, and exploring nitrogen cycle processes, including nitrification, denitrification, and ammonification.