Biology (A) 9BN0/03 May June 2018 | Edexcel A Level Past Papers With Mark Scheme

Edexcel A Level Biology A (9BN0) Jun 2018

معلم موافق رایگان بودن است.

1. DNA Analysis and Forensics: Polymerase Chain Reaction (PCR) for DNA amplification, gel electrophoresis to determine DNA sources, and its use in forensic investigations.

2. Climate Change and Ecology: Impact of sea ice presence on polar bears, relationship between climate data and ecosystem changes, and prediction of future climate patterns.

3. Forensic Entomology and Decomposition: Blowfly species survival at different temperatures, statistical correlation using Spearman’s rank, and insect activity in forensic investigations.

4. Seed Germination and Storage: Effect of storage time and conditions on seed germination rates, importance of control groups, and impact on plant growth.

5. Muscle Contraction and Calcium Ions: Role of calcium ions in muscle fiber contraction, effect of ion concentration on force production, and implications for muscle physiology.

6. Lipids and Molecular Structure: Identification of ester bonds in triglycerides, structural differences between saturated and unsaturated fatty acids, and their biological significance.