Biology (A) 9BN0/01 May June 2023 | Edexcel A Level Past Papers With Mark Scheme

Edexcel A Level Biology A (9BN0) Jun 2023

معلم موافق رایگان بودن است.

1. Evolution and DNA Analysis: Use of PCR and gel electrophoresis to analyze Homo species DNA, determining genetic relationships between Homo longi and other species.

2. Biodiversity and Environmental Impact: Measuring biodiversity in different pond ecosystems, effects of pollutants on species diversity, and calculation of the index of diversity.

3. Genetics and Cell Division: Structure and replication of DNA, semi-conservative replication, mitosis observation in plant tissues, and role of chromosomal organization.

4. Seed Banks and Medicinal Plants: Conservation of endangered species through seed banking, drug development from plants, and phases of clinical trials for new medicines.

5. Respiratory Adaptations and Evolution: Myoglobin function in diving shrews, natural selection leading to physiological changes, and gene mutations affecting protein structure.

6. Antibiotic Resistance and Infection Control: Mechanisms of bacterial resistance, effectiveness of bactericidal vs. bacteriostatic antibiotics, and strategies to prevent antibiotic-resistant infections.