Biology (A) 9BN0/03 May June 2021

Edexcel A Level Biology A (9BN0) Jun 2021

معلم موافق رایگان بودن است.

1. Phototropism and Plant Hormones: Role of IAA (auxin) in directional plant growth, influence of light on hormone distribution, and experimental observations on seedlings.

2. Neurotransmission and Enzyme Regulation: Function of acetylcholinesterase in synapses, gene expression in different tissues, and impact of enzyme inhibitors on nerve signal transmission.

3. Cardiovascular Pharmacology and Beta-Blockers: Effects of beta-blockers on heart rate during exercise, relationship with adrenaline, and implications for blood circulation and hypertension treatment.

4. Lipid Metabolism and Enzymatic Activity: Influence of temperature on lipoprotein lipase function, triglyceride breakdown in fish species, and metabolic adaptations in varying environments.

5. Ecosystem Impact of Deforestation: Analysis of bird species diversity after tree removal, statistical significance using Chi-square tests, and forest management strategies for sustainability.

6. Genetic Modification and Disease Research: Creation of genetically engineered Drosophila to express human TAU proteins, implications for neurodegenerative disease studies, and behavioral analysis in experimental models.